116 files changed, 3819 insertions, 3201 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index edca221b1..cf05a3fe3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -121,6 +121,7 @@ else()
        -Wno-attributes
        -Wno-invalid-offsetof
        -Wno-unused-parameter
+        -Wno-missing-field-initializers
    )
    if (CMAKE_CXX_COMPILER_ID MATCHES Clang) # Clang or AppleClang
diff --git a/src/android/app/src/main/jni/native.cpp b/src/android/app/src/main/jni/native.cpp
index 1226219ad..5d484a85e 100644
--- a/src/android/app/src/main/jni/native.cpp
+++ b/src/android/app/src/main/jni/native.cpp
@@ -668,7 +668,7 @@ void Java_org_yuzu_yuzu_1emu_NativeLibrary_initializeEmptyUserDirectory(JNIEnv*
    ASSERT(user_id);
    const auto user_save_data_path = FileSys::SaveDataFactory::GetFullPath(
-        {}, vfs_nand_dir, FileSys::SaveDataSpaceId::NandUser, FileSys::SaveDataType::SaveData, 1,
+        {}, vfs_nand_dir, FileSys::SaveDataSpaceId::User, FileSys::SaveDataType::Account, 1,
        user_id->AsU128(), 0);
    const auto full_path = Common::FS::ConcatPathSafe(nand_dir, user_save_data_path);
@@ -836,8 +836,8 @@ jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getSavePath(JNIEnv* env, jobject j
                                                            FileSys::OpenMode::Read);
    const auto user_save_data_path = FileSys::SaveDataFactory::GetFullPath(
-        {}, vfsNandDir, FileSys::SaveDataSpaceId::NandUser, FileSys::SaveDataType::SaveData,
+        {}, vfsNandDir, FileSys::SaveDataSpaceId::User, FileSys::SaveDataType::Account, program_id,
-        program_id, user_id->AsU128(), 0);
+        user_id->AsU128(), 0);
    return Common::Android::ToJString(env, user_save_data_path);
 }
diff --git a/src/audio_core/audio_in_manager.cpp b/src/audio_core/audio_in_manager.cpp
index a3667524f..63b064922 100644
--- a/src/audio_core/audio_in_manager.cpp
+++ b/src/audio_core/audio_in_manager.cpp
@@ -73,16 +73,15 @@ void Manager::BufferReleaseAndRegister() {
    }
 }
-u32 Manager::GetDeviceNames(std::vector<Renderer::AudioDevice::AudioDeviceName>& names,
+u32 Manager::GetDeviceNames(std::span<Renderer::AudioDevice::AudioDeviceName> names,
-                            [[maybe_unused]] const u32 max_count,
                            [[maybe_unused]] const bool filter) {
    std::scoped_lock l{mutex};
    LinkToManager();
    auto input_devices{Sink::GetDeviceListForSink(Settings::values.sink_id.GetValue(), true)};
-    if (input_devices.size() > 1) {
+    if (!input_devices.empty() && !names.empty()) {
-        names.emplace_back("Uac");
+        names[0] = Renderer::AudioDevice::AudioDeviceName("Uac");
        return 1;
    }
    return 0;
diff --git a/src/audio_core/audio_in_manager.h b/src/audio_core/audio_in_manager.h
index 5c4614cd1..2179990e0 100644
--- a/src/audio_core/audio_in_manager.h
+++ b/src/audio_core/audio_in_manager.h
@@ -60,13 +60,11 @@ public:
     * Get a list of audio in device names.
     *
     * @param names     - Output container to write names to.
-     * @param max_count - Maximum number of device names to write. Unused
     * @param filter    - Should the list be filtered? Unused.
     *
     * @return Number of names written.
     */
-    u32 GetDeviceNames(std::vector<Renderer::AudioDevice::AudioDeviceName>& names, u32 max_count,
+    u32 GetDeviceNames(std::span<Renderer::AudioDevice::AudioDeviceName> names, bool filter);
-                       bool filter);
    /// Core system
    Core::System& system;
diff --git a/src/audio_core/device/audio_buffers.h b/src/audio_core/device/audio_buffers.h
index 5d8ed0ef7..9e84a9c05 100644
--- a/src/audio_core/device/audio_buffers.h
+++ b/src/audio_core/device/audio_buffers.h
@@ -146,7 +146,11 @@ public:
                break;
            }
-            tags[released++] = tag;
+            if (released < tags.size()) {
+                tags[released] = tag;
+            }
+            released++;
            if (released >= tags.size()) {
                break;
diff --git a/src/audio_core/opus/decoder.cpp b/src/audio_core/opus/decoder.cpp
index b7fed5304..0c110cbeb 100644
--- a/src/audio_core/opus/decoder.cpp
+++ b/src/audio_core/opus/decoder.cpp
@@ -28,8 +28,8 @@ OpusDecoder::~OpusDecoder() {
    }
 }
-Result OpusDecoder::Initialize(OpusParametersEx& params, Kernel::KTransferMemory* transfer_memory,
+Result OpusDecoder::Initialize(const OpusParametersEx& params,
-                               u64 transfer_memory_size) {
+                               Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size) {
    auto frame_size{params.use_large_frame_size ? 5760 : 1920};
    shared_buffer_size = transfer_memory_size;
    shared_buffer = std::make_unique<u8[]>(shared_buffer_size);
@@ -59,7 +59,7 @@ Result OpusDecoder::Initialize(OpusParametersEx& params, Kernel::KTransferMemory
    R_SUCCEED();
 }
-Result OpusDecoder::Initialize(OpusMultiStreamParametersEx& params,
+Result OpusDecoder::Initialize(const OpusMultiStreamParametersEx& params,
                               Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size) {
    auto frame_size{params.use_large_frame_size ? 5760 : 1920};
    shared_buffer_size = transfer_memory_size;
diff --git a/src/audio_core/opus/decoder.h b/src/audio_core/opus/decoder.h
index fd728958a..1b8c257d4 100644
--- a/src/audio_core/opus/decoder.h
+++ b/src/audio_core/opus/decoder.h
@@ -22,10 +22,10 @@ public:
    explicit OpusDecoder(Core::System& system, HardwareOpus& hardware_opus_);
    ~OpusDecoder();
-    Result Initialize(OpusParametersEx& params, Kernel::KTransferMemory* transfer_memory,
+    Result Initialize(const OpusParametersEx& params, Kernel::KTransferMemory* transfer_memory,
-                      u64 transfer_memory_size);
-    Result Initialize(OpusMultiStreamParametersEx& params, Kernel::KTransferMemory* transfer_memory,
                      u64 transfer_memory_size);
+    Result Initialize(const OpusMultiStreamParametersEx& params,
+                      Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size);
    Result DecodeInterleaved(u32* out_data_size, u64* out_time_taken, u32* out_sample_count,
                             std::span<const u8> input_data, std::span<u8> output_data, bool reset);
    Result SetContext([[maybe_unused]] std::span<const u8> context);
diff --git a/src/audio_core/opus/decoder_manager.cpp b/src/audio_core/opus/decoder_manager.cpp
index 1464880a1..89eec1298 100644
--- a/src/audio_core/opus/decoder_manager.cpp
+++ b/src/audio_core/opus/decoder_manager.cpp
@@ -38,7 +38,7 @@ OpusDecoderManager::OpusDecoderManager(Core::System& system_)
    }
 }
-Result OpusDecoderManager::GetWorkBufferSize(OpusParameters& params, u64& out_size) {
+Result OpusDecoderManager::GetWorkBufferSize(const OpusParameters& params, u32& out_size) {
    OpusParametersEx ex{
        .sample_rate = params.sample_rate,
        .channel_count = params.channel_count,
@@ -47,11 +47,11 @@ Result OpusDecoderManager::GetWorkBufferSize(OpusParameters& params, u64& out_si
    R_RETURN(GetWorkBufferSizeExEx(ex, out_size));
 }
-Result OpusDecoderManager::GetWorkBufferSizeEx(OpusParametersEx& params, u64& out_size) {
+Result OpusDecoderManager::GetWorkBufferSizeEx(const OpusParametersEx& params, u32& out_size) {
    R_RETURN(GetWorkBufferSizeExEx(params, out_size));
 }
-Result OpusDecoderManager::GetWorkBufferSizeExEx(OpusParametersEx& params, u64& out_size) {
+Result OpusDecoderManager::GetWorkBufferSizeExEx(const OpusParametersEx& params, u32& out_size) {
    R_UNLESS(IsValidChannelCount(params.channel_count), ResultInvalidOpusChannelCount);
    R_UNLESS(IsValidSampleRate(params.sample_rate), ResultInvalidOpusSampleRate);
@@ -63,8 +63,8 @@ Result OpusDecoderManager::GetWorkBufferSizeExEx(OpusParametersEx& params, u64&
    R_SUCCEED();
 }
-Result OpusDecoderManager::GetWorkBufferSizeForMultiStream(OpusMultiStreamParameters& params,
+Result OpusDecoderManager::GetWorkBufferSizeForMultiStream(const OpusMultiStreamParameters& params,
-                                                           u64& out_size) {
+                                                           u32& out_size) {
    OpusMultiStreamParametersEx ex{
        .sample_rate = params.sample_rate,
        .channel_count = params.channel_count,
@@ -76,13 +76,13 @@ Result OpusDecoderManager::GetWorkBufferSizeForMultiStream(OpusMultiStreamParame
    R_RETURN(GetWorkBufferSizeForMultiStreamExEx(ex, out_size));
 }
-Result OpusDecoderManager::GetWorkBufferSizeForMultiStreamEx(OpusMultiStreamParametersEx& params,
+Result OpusDecoderManager::GetWorkBufferSizeForMultiStreamEx(
-                                                             u64& out_size) {
+    const OpusMultiStreamParametersEx& params, u32& out_size) {
    R_RETURN(GetWorkBufferSizeForMultiStreamExEx(params, out_size));
 }
-Result OpusDecoderManager::GetWorkBufferSizeForMultiStreamExEx(OpusMultiStreamParametersEx& params,
+Result OpusDecoderManager::GetWorkBufferSizeForMultiStreamExEx(
-                                                               u64& out_size) {
+    const OpusMultiStreamParametersEx& params, u32& out_size) {
    R_UNLESS(IsValidMultiStreamChannelCount(params.channel_count), ResultInvalidOpusChannelCount);
    R_UNLESS(IsValidSampleRate(params.sample_rate), ResultInvalidOpusSampleRate);
    R_UNLESS(IsValidStreamCount(params.channel_count, params.total_stream_count,
diff --git a/src/audio_core/opus/decoder_manager.h b/src/audio_core/opus/decoder_manager.h
index 70ebc4bab..8f6876d5c 100644
--- a/src/audio_core/opus/decoder_manager.h
+++ b/src/audio_core/opus/decoder_manager.h
@@ -22,17 +22,19 @@ public:
        return hardware_opus;
    }
-    Result GetWorkBufferSize(OpusParameters& params, u64& out_size);
+    Result GetWorkBufferSize(const OpusParameters& params, u32& out_size);
-    Result GetWorkBufferSizeEx(OpusParametersEx& params, u64& out_size);
+    Result GetWorkBufferSizeEx(const OpusParametersEx& params, u32& out_size);
-    Result GetWorkBufferSizeExEx(OpusParametersEx& params, u64& out_size);
+    Result GetWorkBufferSizeExEx(const OpusParametersEx& params, u32& out_size);
-    Result GetWorkBufferSizeForMultiStream(OpusMultiStreamParameters& params, u64& out_size);
+    Result GetWorkBufferSizeForMultiStream(const OpusMultiStreamParameters& params, u32& out_size);
-    Result GetWorkBufferSizeForMultiStreamEx(OpusMultiStreamParametersEx& params, u64& out_size);
+    Result GetWorkBufferSizeForMultiStreamEx(const OpusMultiStreamParametersEx& params,
-    Result GetWorkBufferSizeForMultiStreamExEx(OpusMultiStreamParametersEx& params, u64& out_size);
+                                             u32& out_size);
+    Result GetWorkBufferSizeForMultiStreamExEx(const OpusMultiStreamParametersEx& params,
+                                               u32& out_size);
 private:
    Core::System& system;
    HardwareOpus hardware_opus;
-    std::array<u64, MaxChannels> required_workbuffer_sizes{};
+    std::array<u32, MaxChannels> required_workbuffer_sizes{};
 };
 } // namespace AudioCore::OpusDecoder
diff --git a/src/audio_core/opus/hardware_opus.cpp b/src/audio_core/opus/hardware_opus.cpp
index 5ff71ab2d..30805f4a3 100644
--- a/src/audio_core/opus/hardware_opus.cpp
+++ b/src/audio_core/opus/hardware_opus.cpp
@@ -42,7 +42,7 @@ HardwareOpus::HardwareOpus(Core::System& system_)
    opus_decoder.SetSharedMemory(shared_memory);
 }
-u64 HardwareOpus::GetWorkBufferSize(u32 channel) {
+u32 HardwareOpus::GetWorkBufferSize(u32 channel) {
    if (!opus_decoder.IsRunning()) {
        return 0;
    }
@@ -55,10 +55,10 @@ u64 HardwareOpus::GetWorkBufferSize(u32 channel) {
                  ADSP::OpusDecoder::Message::GetWorkBufferSizeOK, msg);
        return 0;
    }
-    return shared_memory.dsp_return_data[0];
+    return static_cast<u32>(shared_memory.dsp_return_data[0]);
 }
-u64 HardwareOpus::GetWorkBufferSizeForMultiStream(u32 total_stream_count, u32 stereo_stream_count) {
+u32 HardwareOpus::GetWorkBufferSizeForMultiStream(u32 total_stream_count, u32 stereo_stream_count) {
    std::scoped_lock l{mutex};
    shared_memory.host_send_data[0] = total_stream_count;
    shared_memory.host_send_data[1] = stereo_stream_count;
@@ -70,7 +70,7 @@ u64 HardwareOpus::GetWorkBufferSizeForMultiStream(u32 total_stream_count, u32 st
                  ADSP::OpusDecoder::Message::GetWorkBufferSizeForMultiStreamOK, msg);
        return 0;
    }
-    return shared_memory.dsp_return_data[0];
+    return static_cast<u32>(shared_memory.dsp_return_data[0]);
 }
 Result HardwareOpus::InitializeDecodeObject(u32 sample_rate, u32 channel_count, void* buffer,
@@ -94,8 +94,9 @@ Result HardwareOpus::InitializeDecodeObject(u32 sample_rate, u32 channel_count,
 Result HardwareOpus::InitializeMultiStreamDecodeObject(u32 sample_rate, u32 channel_count,
                                                       u32 total_stream_count,
-                                                       u32 stereo_stream_count, void* mappings,
+                                                       u32 stereo_stream_count,
-                                                       void* buffer, u64 buffer_size) {
+                                                       const void* mappings, void* buffer,
+                                                       u64 buffer_size) {
    std::scoped_lock l{mutex};
    shared_memory.host_send_data[0] = (u64)buffer;
    shared_memory.host_send_data[1] = buffer_size;
diff --git a/src/audio_core/opus/hardware_opus.h b/src/audio_core/opus/hardware_opus.h
index b10184baa..caa746840 100644
--- a/src/audio_core/opus/hardware_opus.h
+++ b/src/audio_core/opus/hardware_opus.h
@@ -16,14 +16,14 @@ class HardwareOpus {
 public:
    HardwareOpus(Core::System& system);
-    u64 GetWorkBufferSize(u32 channel);
+    u32 GetWorkBufferSize(u32 channel);
-    u64 GetWorkBufferSizeForMultiStream(u32 total_stream_count, u32 stereo_stream_count);
+    u32 GetWorkBufferSizeForMultiStream(u32 total_stream_count, u32 stereo_stream_count);
    Result InitializeDecodeObject(u32 sample_rate, u32 channel_count, void* buffer,
                                  u64 buffer_size);
    Result InitializeMultiStreamDecodeObject(u32 sample_rate, u32 channel_count,
                                             u32 totaL_stream_count, u32 stereo_stream_count,
-                                             void* mappings, void* buffer, u64 buffer_size);
+                                             const void* mappings, void* buffer, u64 buffer_size);
    Result ShutdownDecodeObject(void* buffer, u64 buffer_size);
    Result ShutdownMultiStreamDecodeObject(void* buffer, u64 buffer_size);
    Result DecodeInterleaved(u32& out_sample_count, void* output_data, u64 output_data_size,
diff --git a/src/audio_core/opus/parameters.h b/src/audio_core/opus/parameters.h
index 4c54b2825..47c418b9f 100644
--- a/src/audio_core/opus/parameters.h
+++ b/src/audio_core/opus/parameters.h
@@ -20,7 +20,7 @@ struct OpusParametersEx {
    /* 0x00 */ u32 sample_rate;
    /* 0x04 */ u32 channel_count;
    /* 0x08 */ bool use_large_frame_size;
-    /* 0x09 */ INSERT_PADDING_BYTES(7);
+    /* 0x09 */ INSERT_PADDING_BYTES_NOINIT(7);
 }; // size = 0x10
 static_assert(sizeof(OpusParametersEx) == 0x10, "OpusParametersEx has the wrong size!");
@@ -40,7 +40,7 @@ struct OpusMultiStreamParametersEx {
    /* 0x08 */ u32 total_stream_count;
    /* 0x0C */ u32 stereo_stream_count;
    /* 0x10 */ bool use_large_frame_size;
-    /* 0x11 */ INSERT_PADDING_BYTES(7);
+    /* 0x11 */ INSERT_PADDING_BYTES_NOINIT(7);
    /* 0x18 */ std::array<u8, OpusStreamCountMax + 1> mappings;
 }; // size = 0x118
 static_assert(sizeof(OpusMultiStreamParametersEx) == 0x118,
diff --git a/src/audio_core/renderer/audio_device.cpp b/src/audio_core/renderer/audio_device.cpp
index 2d9bf82bb..5be5594f6 100644
--- a/src/audio_core/renderer/audio_device.cpp
+++ b/src/audio_core/renderer/audio_device.cpp
@@ -36,8 +36,7 @@ AudioDevice::AudioDevice(Core::System& system, const u64 applet_resource_user_id
    : output_sink{system.AudioCore().GetOutputSink()},
      applet_resource_user_id{applet_resource_user_id_}, user_revision{revision} {}
-u32 AudioDevice::ListAudioDeviceName(std::vector<AudioDeviceName>& out_buffer,
+u32 AudioDevice::ListAudioDeviceName(std::span<AudioDeviceName> out_buffer) const {
-                                     const size_t max_count) const {
    std::span<const AudioDeviceName> names{};
    if (CheckFeatureSupported(SupportTags::AudioUsbDeviceOutput, user_revision)) {
@@ -46,19 +45,18 @@ u32 AudioDevice::ListAudioDeviceName(std::vector<AudioDeviceName>& out_buffer,
        names = device_names;
    }
-    const u32 out_count{static_cast<u32>(std::min(max_count, names.size()))};
+    const u32 out_count{static_cast<u32>(std::min(out_buffer.size(), names.size()))};
    for (u32 i = 0; i < out_count; i++) {
-        out_buffer.push_back(names[i]);
+        out_buffer[i] = names[i];
    }
    return out_count;
 }
-u32 AudioDevice::ListAudioOutputDeviceName(std::vector<AudioDeviceName>& out_buffer,
+u32 AudioDevice::ListAudioOutputDeviceName(std::span<AudioDeviceName> out_buffer) const {
-                                           const size_t max_count) const {
+    const u32 out_count{static_cast<u32>(std::min(out_buffer.size(), output_device_names.size()))};
-    const u32 out_count{static_cast<u32>(std::min(max_count, output_device_names.size()))};
    for (u32 i = 0; i < out_count; i++) {
-        out_buffer.push_back(output_device_names[i]);
+        out_buffer[i] = output_device_names[i];
    }
    return out_count;
 }
diff --git a/src/audio_core/renderer/audio_device.h b/src/audio_core/renderer/audio_device.h
index ca4040add..4242dad30 100644
--- a/src/audio_core/renderer/audio_device.h
+++ b/src/audio_core/renderer/audio_device.h
@@ -36,20 +36,18 @@ public:
     * Get a list of the available output devices.
     *
     * @param out_buffer - Output buffer to write the available device names.
-     * @param max_count  - Maximum number of devices to write (count of out_buffer).
     * @return Number of device names written.
     */
-    u32 ListAudioDeviceName(std::vector<AudioDeviceName>& out_buffer, size_t max_count) const;
+    u32 ListAudioDeviceName(std::span<AudioDeviceName> out_buffer) const;
    /**
     * Get a list of the available output devices.
     * Different to above somehow...
     *
     * @param out_buffer - Output buffer to write the available device names.
-     * @param max_count  - Maximum number of devices to write (count of out_buffer).
     * @return Number of device names written.
     */
-    u32 ListAudioOutputDeviceName(std::vector<AudioDeviceName>& out_buffer, size_t max_count) const;
+    u32 ListAudioOutputDeviceName(std::span<AudioDeviceName> out_buffer) const;
    /**
     * Set the volume of all streams in the backend sink.
diff --git a/src/audio_core/renderer/audio_renderer.cpp b/src/audio_core/renderer/audio_renderer.cpp
index df03d03aa..7c728cb86 100644
--- a/src/audio_core/renderer/audio_renderer.cpp
+++ b/src/audio_core/renderer/audio_renderer.cpp
@@ -17,9 +17,8 @@ Renderer::Renderer(Core::System& system_, Manager& manager_, Kernel::KEvent* ren
 Result Renderer::Initialize(const AudioRendererParameterInternal& params,
                            Kernel::KTransferMemory* transfer_memory,
-                            const u64 transfer_memory_size, const u32 process_handle,
+                            const u64 transfer_memory_size, Kernel::KProcess* process_handle,
-                            Kernel::KProcess& process, const u64 applet_resource_user_id,
+                            const u64 applet_resource_user_id, const s32 session_id) {
-                            const s32 session_id) {
    if (params.execution_mode == ExecutionMode::Auto) {
        if (!manager.AddSystem(system)) {
            LOG_ERROR(Service_Audio,
@@ -30,7 +29,7 @@ Result Renderer::Initialize(const AudioRendererParameterInternal& params,
    }
    initialized = true;
-    system.Initialize(params, transfer_memory, transfer_memory_size, process_handle, process,
+    system.Initialize(params, transfer_memory, transfer_memory_size, process_handle,
                      applet_resource_user_id, session_id);
    return ResultSuccess;
diff --git a/src/audio_core/renderer/audio_renderer.h b/src/audio_core/renderer/audio_renderer.h
index 1219f74ca..f16adeda7 100644
--- a/src/audio_core/renderer/audio_renderer.h
+++ b/src/audio_core/renderer/audio_renderer.h
@@ -38,14 +38,14 @@ public:
     * @param params                  - Input parameters to initialize the system with.
     * @param transfer_memory         - Game-supplied memory for all workbuffers. Unused.
     * @param transfer_memory_size    - Size of the transfer memory. Unused.
-     * @param process_handle          - Process handle, also used for memory. Unused.
+     * @param process_handle          - Process handle, also used for memory.
     * @param applet_resource_user_id - Applet id for this renderer. Unused.
     * @param session_id              - Session id of this renderer.
     * @return Result code.
     */
    Result Initialize(const AudioRendererParameterInternal& params,
                      Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
-                      u32 process_handle, Kernel::KProcess& process, u64 applet_resource_user_id,
+                      Kernel::KProcess* process_handle, u64 applet_resource_user_id,
                      s32 session_id);
    /**
diff --git a/src/audio_core/renderer/behavior/info_updater.cpp b/src/audio_core/renderer/behavior/info_updater.cpp
index 667711e17..3dae6069f 100644
--- a/src/audio_core/renderer/behavior/info_updater.cpp
+++ b/src/audio_core/renderer/behavior/info_updater.cpp
@@ -18,7 +18,7 @@
 namespace AudioCore::Renderer {
 InfoUpdater::InfoUpdater(std::span<const u8> input_, std::span<u8> output_,
-                         const u32 process_handle_, BehaviorInfo& behaviour_)
+                         Kernel::KProcess* process_handle_, BehaviorInfo& behaviour_)
    : input{input_.data() + sizeof(UpdateDataHeader)},
      input_origin{input_}, output{output_.data() + sizeof(UpdateDataHeader)},
      output_origin{output_}, in_header{reinterpret_cast<const UpdateDataHeader*>(
diff --git a/src/audio_core/renderer/behavior/info_updater.h b/src/audio_core/renderer/behavior/info_updater.h
index fb4b7d25a..4f27a817e 100644
--- a/src/audio_core/renderer/behavior/info_updater.h
+++ b/src/audio_core/renderer/behavior/info_updater.h
@@ -8,6 +8,10 @@
 #include "common/common_types.h"
 #include "core/hle/service/audio/errors.h"
+namespace Kernel {
+class KProcess;
+}
 namespace AudioCore::Renderer {
 class BehaviorInfo;
 class VoiceContext;
@@ -39,8 +43,8 @@ class InfoUpdater {
    static_assert(sizeof(UpdateDataHeader) == 0x40, "UpdateDataHeader has the wrong size!");
 public:
-    explicit InfoUpdater(std::span<const u8> input, std::span<u8> output, u32 process_handle,
+    explicit InfoUpdater(std::span<const u8> input, std::span<u8> output,
-                         BehaviorInfo& behaviour);
+                         Kernel::KProcess* process_handle, BehaviorInfo& behaviour);
    /**
     * Update the voice channel resources.
@@ -197,7 +201,7 @@ private:
    /// Expected output size, see CheckConsumedSize
    u64 expected_output_size;
    /// Unused
-    u32 process_handle;
+    Kernel::KProcess* process_handle;
    /// Behaviour
    BehaviorInfo& behaviour;
 };
diff --git a/src/audio_core/renderer/memory/pool_mapper.cpp b/src/audio_core/renderer/memory/pool_mapper.cpp
index 999bb746b..e47eb66d5 100644
--- a/src/audio_core/renderer/memory/pool_mapper.cpp
+++ b/src/audio_core/renderer/memory/pool_mapper.cpp
@@ -8,11 +8,11 @@
 namespace AudioCore::Renderer {
-PoolMapper::PoolMapper(u32 process_handle_, bool force_map_)
+PoolMapper::PoolMapper(Kernel::KProcess* process_handle_, bool force_map_)
    : process_handle{process_handle_}, force_map{force_map_} {}
-PoolMapper::PoolMapper(u32 process_handle_, std::span<MemoryPoolInfo> pool_infos_, u32 pool_count_,
+PoolMapper::PoolMapper(Kernel::KProcess* process_handle_, std::span<MemoryPoolInfo> pool_infos_,
-                       bool force_map_)
+                       u32 pool_count_, bool force_map_)
    : process_handle{process_handle_}, pool_infos{pool_infos_.data()},
      pool_count{pool_count_}, force_map{force_map_} {}
@@ -106,15 +106,17 @@ bool PoolMapper::IsForceMapEnabled() const {
    return force_map;
 }
-u32 PoolMapper::GetProcessHandle(const MemoryPoolInfo* pool) const {
+Kernel::KProcess* PoolMapper::GetProcessHandle(const MemoryPoolInfo* pool) const {
    switch (pool->GetLocation()) {
    case MemoryPoolInfo::Location::CPU:
        return process_handle;
    case MemoryPoolInfo::Location::DSP:
-        return Kernel::Svc::CurrentProcess;
+        // return Kernel::Svc::CurrentProcess;
+        return nullptr;
    }
    LOG_WARNING(Service_Audio, "Invalid MemoryPoolInfo location!");
-    return Kernel::Svc::CurrentProcess;
+    // return Kernel::Svc::CurrentProcess;
+    return nullptr;
 }
 bool PoolMapper::Map([[maybe_unused]] const u32 handle, [[maybe_unused]] const CpuAddr cpu_addr,
@@ -147,14 +149,14 @@ bool PoolMapper::Unmap([[maybe_unused]] const u32 handle, [[maybe_unused]] const
 }
 bool PoolMapper::Unmap(MemoryPoolInfo& pool) const {
-    [[maybe_unused]] u32 handle{0};
+    [[maybe_unused]] Kernel::KProcess* handle{};
    switch (pool.GetLocation()) {
    case MemoryPoolInfo::Location::CPU:
        handle = process_handle;
        break;
    case MemoryPoolInfo::Location::DSP:
-        handle = Kernel::Svc::CurrentProcess;
+        // handle = Kernel::Svc::CurrentProcess;
        break;
    }
    // nn::audio::dsp::UnmapUserPointer(handle, pool->cpu_address, pool->size);
diff --git a/src/audio_core/renderer/memory/pool_mapper.h b/src/audio_core/renderer/memory/pool_mapper.h
index 95ae5d8ea..fb5122b73 100644
--- a/src/audio_core/renderer/memory/pool_mapper.h
+++ b/src/audio_core/renderer/memory/pool_mapper.h
@@ -10,6 +10,10 @@
 #include "common/common_types.h"
 #include "core/hle/service/audio/errors.h"
+namespace Kernel {
+class KProcess;
+}
 namespace AudioCore::Renderer {
 class AddressInfo;
@@ -18,9 +22,9 @@ class AddressInfo;
 */
 class PoolMapper {
 public:
-    explicit PoolMapper(u32 process_handle, bool force_map);
+    explicit PoolMapper(Kernel::KProcess* process_handle, bool force_map);
-    explicit PoolMapper(u32 process_handle, std::span<MemoryPoolInfo> pool_infos, u32 pool_count,
+    explicit PoolMapper(Kernel::KProcess* process_handle, std::span<MemoryPoolInfo> pool_infos,
-                        bool force_map);
+                        u32 pool_count, bool force_map);
    /**
     * Clear the usage state for all given pools.
@@ -98,7 +102,7 @@ public:
     * @return CurrentProcessHandle if location == DSP,
     *         the PoolMapper's process_handle if location == CPU
     */
-    u32 GetProcessHandle(const MemoryPoolInfo* pool) const;
+    Kernel::KProcess* GetProcessHandle(const MemoryPoolInfo* pool) const;
    /**
     * Map the given region with the given handle. This is a no-op.
@@ -167,7 +171,7 @@ public:
 private:
    /// Process handle for this mapper, used when location == CPU
-    u32 process_handle;
+    Kernel::KProcess* process_handle{};
    /// List of memory pools assigned to this mapper
    MemoryPoolInfo* pool_infos{};
    /// The number of pools
diff --git a/src/audio_core/renderer/system.cpp b/src/audio_core/renderer/system.cpp
index ca656edae..c30d68426 100644
--- a/src/audio_core/renderer/system.cpp
+++ b/src/audio_core/renderer/system.cpp
@@ -102,8 +102,8 @@ System::System(Core::System& core_, Kernel::KEvent* adsp_rendered_event_)
 Result System::Initialize(const AudioRendererParameterInternal& params,
                          Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
-                          u32 process_handle_, Kernel::KProcess& process_,
+                          Kernel::KProcess* process_handle_, u64 applet_resource_user_id_,
-                          u64 applet_resource_user_id_, s32 session_id_) {
+                          s32 session_id_) {
    if (!CheckValidRevision(params.revision)) {
        return Service::Audio::ResultInvalidRevision;
    }
@@ -119,7 +119,6 @@ Result System::Initialize(const AudioRendererParameterInternal& params,
    behavior.SetUserLibRevision(params.revision);
    process_handle = process_handle_;
-    process = &process_;
    applet_resource_user_id = applet_resource_user_id_;
    session_id = session_id_;
@@ -132,7 +131,8 @@ Result System::Initialize(const AudioRendererParameterInternal& params,
    render_device = params.rendering_device;
    execution_mode = params.execution_mode;
-    process->GetMemory().ZeroBlock(transfer_memory->GetSourceAddress(), transfer_memory_size);
+    process_handle->GetMemory().ZeroBlock(transfer_memory->GetSourceAddress(),
+                                          transfer_memory_size);
    // Note: We're not actually using the transfer memory because it's a pain to code for.
    // Allocate the memory normally instead and hope the game doesn't try to read anything back
@@ -616,7 +616,7 @@ void System::SendCommandToDsp() {
                static_cast<u64>((time_limit_percent / 100) * 2'880'000.0 *
                                 (static_cast<f32>(render_time_limit_percent) / 100.0f))};
            audio_renderer.SetCommandBuffer(session_id, translated_addr, command_size, time_limit,
-                                            applet_resource_user_id, process,
+                                            applet_resource_user_id, process_handle,
                                            reset_command_buffers);
            reset_command_buffers = false;
            command_buffer_size = command_size;
diff --git a/src/audio_core/renderer/system.h b/src/audio_core/renderer/system.h
index 753a0b796..3533a74ef 100644
--- a/src/audio_core/renderer/system.h
+++ b/src/audio_core/renderer/system.h
@@ -74,14 +74,14 @@ public:
     * @param params                  - Input parameters to initialize the system with.
     * @param transfer_memory         - Game-supplied memory for all workbuffers. Unused.
     * @param transfer_memory_size    - Size of the transfer memory. Unused.
-     * @param process_handle          - Process handle, also used for memory. Unused.
+     * @param process_handle          - Process handle, also used for memory.
     * @param applet_resource_user_id - Applet id for this renderer. Unused.
     * @param session_id              - Session id of this renderer.
     * @return Result code.
     */
    Result Initialize(const AudioRendererParameterInternal& params,
                      Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
-                      u32 process_handle, Kernel::KProcess& process, u64 applet_resource_user_id,
+                      Kernel::KProcess* process_handle, u64 applet_resource_user_id,
                      s32 session_id);
    /**
@@ -278,9 +278,7 @@ private:
    /// Does what locks do
    std::mutex lock{};
    /// Process this audio render is operating within, used for memory reads/writes.
-    Kernel::KProcess* process{};
+    Kernel::KProcess* process_handle{};
-    /// Handle for the process for this system, unused
-    u32 process_handle{};
    /// Applet resource id for this system, unused
    u64 applet_resource_user_id{};
    /// Controls performance input and output
diff --git a/src/audio_core/sink/oboe_sink.cpp b/src/audio_core/sink/oboe_sink.cpp
index e61841172..466a9cc8e 100644
--- a/src/audio_core/sink/oboe_sink.cpp
+++ b/src/audio_core/sink/oboe_sink.cpp
@@ -67,9 +67,13 @@ public:
        oboe::AudioStreamBuilder builder;
        const auto result = ConfigureBuilder(builder, direction)->openStream(temp_stream);
-        ASSERT(result == oboe::Result::OK);
+        if (result == oboe::Result::OK) {
+            return temp_stream->getChannelCount() >= 6 ? 6 : 2;
+        }
-        return temp_stream->getChannelCount() >= 6 ? 6 : 2;
+        LOG_ERROR(Audio_Sink, "Failed to open {} stream. Using default channel count 2",
+                  direction == oboe::Direction::Output ? "output" : "input");
+        return 2;
    }
 protected:
diff --git a/src/common/settings.h b/src/common/settings.h
index aa054dc24..b2b071e7e 100644
--- a/src/common/settings.h
+++ b/src/common/settings.h
@@ -384,6 +384,12 @@ struct Values {
                                                                  AstcRecompression::Bc3,
                                                                  "astc_recompression",
                                                                  Category::RendererAdvanced};
+    SwitchableSetting<VramUsageMode, true> vram_usage_mode{linkage,
+                                                           VramUsageMode::Conservative,
+                                                           VramUsageMode::Conservative,
+                                                           VramUsageMode::Aggressive,
+                                                           "vram_usage_mode",
+                                                           Category::RendererAdvanced};
    SwitchableSetting<bool> async_presentation{linkage,
 #ifdef ANDROID
                                               true,
diff --git a/src/common/settings_enums.h b/src/common/settings_enums.h
index f42367e67..6e247e930 100644
--- a/src/common/settings_enums.h
+++ b/src/common/settings_enums.h
@@ -122,6 +122,8 @@ ENUM(AstcRecompression, Uncompressed, Bc1, Bc3);
 ENUM(VSyncMode, Immediate, Mailbox, Fifo, FifoRelaxed);
+ENUM(VramUsageMode, Conservative, Aggressive);
 ENUM(RendererBackend, OpenGL, Vulkan, Null);
 ENUM(ShaderBackend, Glsl, Glasm, SpirV);
diff --git a/src/common/string_util.cpp b/src/common/string_util.cpp
index 72c481798..1909aced5 100644
--- a/src/common/string_util.cpp
+++ b/src/common/string_util.cpp
@@ -38,6 +38,10 @@ std::string StringFromBuffer(std::span<const u8> data) {
    return std::string(data.begin(), std::find(data.begin(), data.end(), '\0'));
 }
+std::string StringFromBuffer(std::span<const char> data) {
+    return std::string(data.begin(), std::find(data.begin(), data.end(), '\0'));
+}
 // Turns "  hej " into "hej". Also handles tabs.
 std::string StripSpaces(const std::string& str) {
    const std::size_t s = str.find_first_not_of(" \t\r\n");
diff --git a/src/common/string_util.h b/src/common/string_util.h
index 9da1ca4e9..53d0549ca 100644
--- a/src/common/string_util.h
+++ b/src/common/string_util.h
@@ -19,6 +19,7 @@ namespace Common {
 [[nodiscard]] std::string ToUpper(std::string str);
 [[nodiscard]] std::string StringFromBuffer(std::span<const u8> data);
+[[nodiscard]] std::string StringFromBuffer(std::span<const char> data);
 [[nodiscard]] std::string StripSpaces(const std::string& s);
 [[nodiscard]] std::string StripQuotes(const std::string& s);
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 45b4b203d..0393eff33 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -58,9 +58,14 @@ add_library(core STATIC
    file_sys/fs_operate_range.h
    file_sys/fs_path.h
    file_sys/fs_path_utility.h
+    file_sys/fs_save_data_types.h
    file_sys/fs_string_util.h
+    file_sys/fsa/fs_i_directory.h
+    file_sys/fsa/fs_i_file.h
+    file_sys/fsa/fs_i_filesystem.h
    file_sys/fsmitm_romfsbuild.cpp
    file_sys/fsmitm_romfsbuild.h
+    file_sys/fssrv/fssrv_sf_path.h
    file_sys/fssystem/fs_i_storage.h
    file_sys/fssystem/fs_types.h
    file_sys/fssystem/fssystem_aes_ctr_counter_extended_storage.cpp
@@ -489,23 +494,33 @@ add_library(core STATIC
    hle/service/apm/apm_controller.h
    hle/service/apm/apm_interface.cpp
    hle/service/apm/apm_interface.h
-    hle/service/audio/audin_u.cpp
-    hle/service/audio/audin_u.h
-    hle/service/audio/audio.cpp
-    hle/service/audio/audio.h
    hle/service/audio/audio_controller.cpp
    hle/service/audio/audio_controller.h
-    hle/service/audio/audout_u.cpp
+    hle/service/audio/audio_device.cpp
-    hle/service/audio/audout_u.h
+    hle/service/audio/audio_device.h
-    hle/service/audio/audrec_a.cpp
+    hle/service/audio/audio_in_manager.cpp
-    hle/service/audio/audrec_a.h
+    hle/service/audio/audio_in_manager.h
-    hle/service/audio/audrec_u.cpp
+    hle/service/audio/audio_in.cpp
-    hle/service/audio/audrec_u.h
+    hle/service/audio/audio_in.h
-    hle/service/audio/audren_u.cpp
+    hle/service/audio/audio_out_manager.cpp
-    hle/service/audio/audren_u.h
+    hle/service/audio/audio_out_manager.h
+    hle/service/audio/audio_out.cpp
+    hle/service/audio/audio_out.h
+    hle/service/audio/audio_renderer_manager.cpp
+    hle/service/audio/audio_renderer_manager.h
+    hle/service/audio/audio_renderer.cpp
+    hle/service/audio/audio_renderer.h
+    hle/service/audio/audio.cpp
+    hle/service/audio/audio.h
    hle/service/audio/errors.h
-    hle/service/audio/hwopus.cpp
+    hle/service/audio/final_output_recorder_manager_for_applet.cpp
-    hle/service/audio/hwopus.h
+    hle/service/audio/final_output_recorder_manager_for_applet.h
+    hle/service/audio/final_output_recorder_manager.cpp
+    hle/service/audio/final_output_recorder_manager.h
+    hle/service/audio/hardware_opus_decoder_manager.cpp
+    hle/service/audio/hardware_opus_decoder_manager.h
+    hle/service/audio/hardware_opus_decoder.cpp
+    hle/service/audio/hardware_opus_decoder.h
    hle/service/bcat/backend/backend.cpp
    hle/service/bcat/backend/backend.h
    hle/service/bcat/bcat.cpp
@@ -595,6 +610,10 @@ add_library(core STATIC
    hle/service/filesystem/fsp/fs_i_file.h
    hle/service/filesystem/fsp/fs_i_filesystem.cpp
    hle/service/filesystem/fsp/fs_i_filesystem.h
+    hle/service/filesystem/fsp/fs_i_multi_commit_manager.cpp
+    hle/service/filesystem/fsp/fs_i_multi_commit_manager.h
+    hle/service/filesystem/fsp/fs_i_save_data_info_reader.cpp
+    hle/service/filesystem/fsp/fs_i_save_data_info_reader.h
    hle/service/filesystem/fsp/fs_i_storage.cpp
    hle/service/filesystem/fsp/fs_i_storage.h
    hle/service/filesystem/fsp/fsp_ldr.cpp
@@ -603,7 +622,7 @@ add_library(core STATIC
    hle/service/filesystem/fsp/fsp_pr.h
    hle/service/filesystem/fsp/fsp_srv.cpp
    hle/service/filesystem/fsp/fsp_srv.h
-    hle/service/filesystem/fsp/fsp_util.h
+    hle/service/filesystem/fsp/fsp_types.h
    hle/service/filesystem/romfs_controller.cpp
    hle/service/filesystem/romfs_controller.h
    hle/service/filesystem/save_data_controller.cpp
@@ -907,6 +926,21 @@ add_library(core STATIC
    hle/service/pm/pm.h
    hle/service/prepo/prepo.cpp
    hle/service/prepo/prepo.h
+    hle/service/psc/ovln/ovln_types.h
+    hle/service/psc/ovln/receiver_service.cpp
+    hle/service/psc/ovln/receiver_service.h
+    hle/service/psc/ovln/receiver.cpp
+    hle/service/psc/ovln/receiver.h
+    hle/service/psc/ovln/sender_service.cpp
+    hle/service/psc/ovln/sender_service.h
+    hle/service/psc/ovln/sender.cpp
+    hle/service/psc/ovln/sender.h
+    hle/service/psc/pm_control.cpp
+    hle/service/psc/pm_control.h
+    hle/service/psc/pm_module.cpp
+    hle/service/psc/pm_module.h
+    hle/service/psc/pm_service.cpp
+    hle/service/psc/pm_service.h
    hle/service/psc/psc.cpp
    hle/service/psc/psc.h
    hle/service/psc/time/alarms.cpp
diff --git a/src/core/device_memory_manager.inc b/src/core/device_memory_manager.inc
index 37c1e69c3..f104d495b 100644
--- a/src/core/device_memory_manager.inc
+++ b/src/core/device_memory_manager.inc
@@ -522,13 +522,17 @@ void DeviceMemoryManager<Traits>::UpdatePagesCachedCount(DAddr addr, size_t size
    auto* memory_device_inter = registered_processes[asid.id];
    const auto release_pending = [&] {
        if (uncache_bytes > 0) {
-            MarkRegionCaching(memory_device_inter, uncache_begin << Memory::YUZU_PAGEBITS,
+            if (memory_device_inter != nullptr) {
-                              uncache_bytes, false);
+                MarkRegionCaching(memory_device_inter, uncache_begin << Memory::YUZU_PAGEBITS,
+                                  uncache_bytes, false);
+            }
            uncache_bytes = 0;
        }
        if (cache_bytes > 0) {
-            MarkRegionCaching(memory_device_inter, cache_begin << Memory::YUZU_PAGEBITS,
+            if (memory_device_inter != nullptr) {
-                              cache_bytes, true);
+                MarkRegionCaching(memory_device_inter, cache_begin << Memory::YUZU_PAGEBITS,
+                                  cache_bytes, true);
+            }
            cache_bytes = 0;
        }
    };
diff --git a/src/core/file_sys/fs_filesystem.h b/src/core/file_sys/fs_filesystem.h
index 7f237b7fa..329b5aca5 100644
--- a/src/core/file_sys/fs_filesystem.h
+++ b/src/core/file_sys/fs_filesystem.h
@@ -23,6 +23,8 @@ enum class OpenDirectoryMode : u64 {
    File = (1 << 1),
    All = (Directory | File),
+    NotRequireFileSize = (1ULL << 31),
 };
 DECLARE_ENUM_FLAG_OPERATORS(OpenDirectoryMode)
@@ -36,4 +38,29 @@ enum class CreateOption : u8 {
    BigFile = (1 << 0),
 };
+struct FileSystemAttribute {
+    u8 dir_entry_name_length_max_defined;
+    u8 file_entry_name_length_max_defined;
+    u8 dir_path_name_length_max_defined;
+    u8 file_path_name_length_max_defined;
+    INSERT_PADDING_BYTES_NOINIT(0x5);
+    u8 utf16_dir_entry_name_length_max_defined;
+    u8 utf16_file_entry_name_length_max_defined;
+    u8 utf16_dir_path_name_length_max_defined;
+    u8 utf16_file_path_name_length_max_defined;
+    INSERT_PADDING_BYTES_NOINIT(0x18);
+    s32 dir_entry_name_length_max;
+    s32 file_entry_name_length_max;
+    s32 dir_path_name_length_max;
+    s32 file_path_name_length_max;
+    INSERT_PADDING_WORDS_NOINIT(0x5);
+    s32 utf16_dir_entry_name_length_max;
+    s32 utf16_file_entry_name_length_max;
+    s32 utf16_dir_path_name_length_max;
+    s32 utf16_file_path_name_length_max;
+    INSERT_PADDING_WORDS_NOINIT(0x18);
+    INSERT_PADDING_WORDS_NOINIT(0x1);
+};
+static_assert(sizeof(FileSystemAttribute) == 0xC0, "FileSystemAttribute has incorrect size");
 } // namespace FileSys
diff --git a/src/core/file_sys/fs_memory_management.h b/src/core/file_sys/fs_memory_management.h
index f03c6354b..080017c5d 100644
--- a/src/core/file_sys/fs_memory_management.h
+++ b/src/core/file_sys/fs_memory_management.h
@@ -10,7 +10,7 @@ namespace FileSys {
 constexpr size_t RequiredAlignment = alignof(u64);
-void* AllocateUnsafe(size_t size) {
+inline void* AllocateUnsafe(size_t size) {
    // Allocate
    void* const ptr = ::operator new(size, std::align_val_t{RequiredAlignment});
@@ -21,16 +21,16 @@ void* AllocateUnsafe(size_t size) {
    return ptr;
 }
-void DeallocateUnsafe(void* ptr, size_t size) {
+inline void DeallocateUnsafe(void* ptr, size_t size) {
    // Deallocate the pointer
    ::operator delete(ptr, std::align_val_t{RequiredAlignment});
 }
-void* Allocate(size_t size) {
+inline void* Allocate(size_t size) {
    return AllocateUnsafe(size);
 }
-void Deallocate(void* ptr, size_t size) {
+inline void Deallocate(void* ptr, size_t size) {
    // If the pointer is non-null, deallocate it
    if (ptr != nullptr) {
        DeallocateUnsafe(ptr, size);
diff --git a/src/core/file_sys/fs_path.h b/src/core/file_sys/fs_path.h
index 56ba08a6a..1566e82b9 100644
--- a/src/core/file_sys/fs_path.h
+++ b/src/core/file_sys/fs_path.h
@@ -381,7 +381,7 @@ public:
        // Check that it's possible for us to remove a child
        auto* p = m_write_buffer.Get();
-        s32 len = std::strlen(p);
+        s32 len = static_cast<s32>(std::strlen(p));
        R_UNLESS(len != 1 || (p[0] != '/' && p[0] != '.'), ResultNotImplemented);
        // Handle a trailing separator
diff --git a/src/core/file_sys/fs_path_utility.h b/src/core/file_sys/fs_path_utility.h
index 5643141f9..cdfd8c772 100644
--- a/src/core/file_sys/fs_path_utility.h
+++ b/src/core/file_sys/fs_path_utility.h
@@ -426,9 +426,10 @@ public:
        R_SUCCEED();
    }
-    static Result Normalize(char* dst, size_t* out_len, const char* path, size_t max_out_size,
+    static constexpr Result Normalize(char* dst, size_t* out_len, const char* path,
-                            bool is_windows_path, bool is_drive_relative_path,
+                                      size_t max_out_size, bool is_windows_path,
-                            bool allow_all_characters = false) {
+                                      bool is_drive_relative_path,
+                                      bool allow_all_characters = false) {
        // Use StringTraits names for remainder of scope
        using namespace StringTraits;
diff --git a/src/core/file_sys/fs_save_data_types.h b/src/core/file_sys/fs_save_data_types.h
new file mode 100644
index 000000000..86a83d217
--- /dev/null
+++ b/src/core/file_sys/fs_save_data_types.h
@@ -0,0 +1,175 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include <array>
+#include <fmt/format.h>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+namespace FileSys {
+using SaveDataId = u64;
+using SystemSaveDataId = u64;
+using SystemBcatSaveDataId = SystemSaveDataId;
+using ProgramId = u64;
+enum class SaveDataSpaceId : u8 {
+    System = 0,
+    User = 1,
+    SdSystem = 2,
+    Temporary = 3,
+    SdUser = 4,
+    ProperSystem = 100,
+    SafeMode = 101,
+};
+enum class SaveDataType : u8 {
+    System = 0,
+    Account = 1,
+    Bcat = 2,
+    Device = 3,
+    Temporary = 4,
+    Cache = 5,
+    SystemBcat = 6,
+};
+enum class SaveDataRank : u8 {
+    Primary = 0,
+    Secondary = 1,
+};
+struct SaveDataSize {
+    u64 normal;
+    u64 journal;
+};
+static_assert(sizeof(SaveDataSize) == 0x10, "SaveDataSize has invalid size.");
+using UserId = u128;
+static_assert(std::is_trivially_copyable_v<UserId>, "Data type must be trivially copyable.");
+static_assert(sizeof(UserId) == 0x10, "UserId has invalid size.");
+constexpr inline SystemSaveDataId InvalidSystemSaveDataId = 0;
+constexpr inline UserId InvalidUserId = {};
+enum class SaveDataFlags : u32 {
+    None = (0 << 0),
+    KeepAfterResettingSystemSaveData = (1 << 0),
+    KeepAfterRefurbishment = (1 << 1),
+    KeepAfterResettingSystemSaveDataWithoutUserSaveData = (1 << 2),
+    NeedsSecureDelete = (1 << 3),
+};
+enum class SaveDataMetaType : u8 {
+    None = 0,
+    Thumbnail = 1,
+    ExtensionContext = 2,
+};
+struct SaveDataMetaInfo {
+    u32 size;
+    SaveDataMetaType type;
+    INSERT_PADDING_BYTES(0xB);
+};
+static_assert(std::is_trivially_copyable_v<SaveDataMetaInfo>,
+              "Data type must be trivially copyable.");
+static_assert(sizeof(SaveDataMetaInfo) == 0x10, "SaveDataMetaInfo has invalid size.");
+struct SaveDataCreationInfo {
+    s64 size;
+    s64 journal_size;
+    s64 block_size;
+    u64 owner_id;
+    u32 flags;
+    SaveDataSpaceId space_id;
+    bool pseudo;
+    INSERT_PADDING_BYTES(0x1A);
+};
+static_assert(std::is_trivially_copyable_v<SaveDataCreationInfo>,
+              "Data type must be trivially copyable.");
+static_assert(sizeof(SaveDataCreationInfo) == 0x40, "SaveDataCreationInfo has invalid size.");
+struct SaveDataAttribute {
+    ProgramId program_id;
+    UserId user_id;
+    SystemSaveDataId system_save_data_id;
+    SaveDataType type;
+    SaveDataRank rank;
+    u16 index;
+    INSERT_PADDING_BYTES(0x1C);
+    static constexpr SaveDataAttribute Make(ProgramId program_id, SaveDataType type, UserId user_id,
+                                            SystemSaveDataId system_save_data_id, u16 index,
+                                            SaveDataRank rank) {
+        return {
+            .program_id = program_id,
+            .user_id = user_id,
+            .system_save_data_id = system_save_data_id,
+            .type = type,
+            .rank = rank,
+            .index = index,
+        };
+    }
+    static constexpr SaveDataAttribute Make(ProgramId program_id, SaveDataType type, UserId user_id,
+                                            SystemSaveDataId system_save_data_id, u16 index) {
+        return Make(program_id, type, user_id, system_save_data_id, index, SaveDataRank::Primary);
+    }
+    static constexpr SaveDataAttribute Make(ProgramId program_id, SaveDataType type, UserId user_id,
+                                            SystemSaveDataId system_save_data_id) {
+        return Make(program_id, type, user_id, system_save_data_id, 0, SaveDataRank::Primary);
+    }
+    std::string DebugInfo() const {
+        return fmt::format(
+            "[title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}, type={:02X}, "
+            "rank={}, index={}]",
+            program_id, user_id[1], user_id[0], system_save_data_id, static_cast<u8>(type),
+            static_cast<u8>(rank), index);
+    }
+};
+static_assert(sizeof(SaveDataAttribute) == 0x40);
+static_assert(std::is_trivially_destructible<SaveDataAttribute>::value);
+constexpr inline bool operator<(const SaveDataAttribute& lhs, const SaveDataAttribute& rhs) {
+    return std::tie(lhs.program_id, lhs.user_id, lhs.system_save_data_id, lhs.index, lhs.rank) <
+           std::tie(rhs.program_id, rhs.user_id, rhs.system_save_data_id, rhs.index, rhs.rank);
+}
+constexpr inline bool operator==(const SaveDataAttribute& lhs, const SaveDataAttribute& rhs) {
+    return std::tie(lhs.program_id, lhs.user_id, lhs.system_save_data_id, lhs.type, lhs.rank,
+                    lhs.index) == std::tie(rhs.program_id, rhs.user_id, rhs.system_save_data_id,
+                                           rhs.type, rhs.rank, rhs.index);
+}
+constexpr inline bool operator!=(const SaveDataAttribute& lhs, const SaveDataAttribute& rhs) {
+    return !(lhs == rhs);
+}
+struct SaveDataExtraData {
+    SaveDataAttribute attr;
+    u64 owner_id;
+    s64 timestamp;
+    u32 flags;
+    INSERT_PADDING_BYTES(4);
+    s64 available_size;
+    s64 journal_size;
+    s64 commit_id;
+    INSERT_PADDING_BYTES(0x190);
+};
+static_assert(sizeof(SaveDataExtraData) == 0x200, "SaveDataExtraData has invalid size.");
+static_assert(std::is_trivially_copyable_v<SaveDataExtraData>,
+              "Data type must be trivially copyable.");
+struct HashSalt {
+    static constexpr size_t Size = 32;
+    std::array<u8, Size> value;
+};
+static_assert(std::is_trivially_copyable_v<HashSalt>, "Data type must be trivially copyable.");
+static_assert(sizeof(HashSalt) == HashSalt::Size);
+} // namespace FileSys
diff --git a/src/core/file_sys/fs_string_util.h b/src/core/file_sys/fs_string_util.h
index 874e09054..c751a8f1a 100644
--- a/src/core/file_sys/fs_string_util.h
+++ b/src/core/file_sys/fs_string_util.h
@@ -20,6 +20,11 @@ constexpr int Strlen(const T* str) {
 }
 template <typename T>
+constexpr int Strnlen(const T* str, std::size_t count) {
+    return Strnlen(str, static_cast<int>(count));
+}
+template <typename T>
 constexpr int Strnlen(const T* str, int count) {
    ASSERT(str != nullptr);
    ASSERT(count >= 0);
@@ -33,6 +38,11 @@ constexpr int Strnlen(const T* str, int count) {
 }
 template <typename T>
+constexpr int Strncmp(const T* lhs, const T* rhs, std::size_t count) {
+    return Strncmp(lhs, rhs, static_cast<int>(count));
+}
+template <typename T>
 constexpr int Strncmp(const T* lhs, const T* rhs, int count) {
    ASSERT(lhs != nullptr);
    ASSERT(rhs != nullptr);
@@ -52,6 +62,11 @@ constexpr int Strncmp(const T* lhs, const T* rhs, int count) {
 }
 template <typename T>
+static constexpr int Strlcpy(T* dst, const T* src, std::size_t count) {
+    return Strlcpy<T>(dst, src, static_cast<int>(count));
+}
+template <typename T>
 static constexpr int Strlcpy(T* dst, const T* src, int count) {
    ASSERT(dst != nullptr);
    ASSERT(src != nullptr);
diff --git a/src/core/file_sys/fsa/fs_i_directory.h b/src/core/file_sys/fsa/fs_i_directory.h
new file mode 100644
index 000000000..c8e895eab
--- /dev/null
+++ b/src/core/file_sys/fsa/fs_i_directory.h
@@ -0,0 +1,91 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "common/common_types.h"
+#include "core/file_sys/errors.h"
+#include "core/file_sys/fs_directory.h"
+#include "core/file_sys/fs_file.h"
+#include "core/file_sys/fs_filesystem.h"
+#include "core/file_sys/savedata_factory.h"
+#include "core/file_sys/vfs/vfs.h"
+#include "core/hle/result.h"
+namespace FileSys::Fsa {
+class IDirectory {
+public:
+    explicit IDirectory(VirtualDir backend_, OpenDirectoryMode mode)
+        : backend(std::move(backend_)) {
+        // TODO(DarkLordZach): Verify that this is the correct behavior.
+        // Build entry index now to save time later.
+        if (True(mode & OpenDirectoryMode::Directory)) {
+            BuildEntryIndex(backend->GetSubdirectories(), DirectoryEntryType::Directory);
+        }
+        if (True(mode & OpenDirectoryMode::File)) {
+            BuildEntryIndex(backend->GetFiles(), DirectoryEntryType::File);
+        }
+    }
+    virtual ~IDirectory() {}
+    Result Read(s64* out_count, DirectoryEntry* out_entries, s64 max_entries) {
+        R_UNLESS(out_count != nullptr, ResultNullptrArgument);
+        if (max_entries == 0) {
+            *out_count = 0;
+            R_SUCCEED();
+        }
+        R_UNLESS(out_entries != nullptr, ResultNullptrArgument);
+        R_UNLESS(max_entries > 0, ResultInvalidArgument);
+        R_RETURN(this->DoRead(out_count, out_entries, max_entries));
+    }
+    Result GetEntryCount(s64* out) {
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        R_RETURN(this->DoGetEntryCount(out));
+    }
+private:
+    Result DoRead(s64* out_count, DirectoryEntry* out_entries, s64 max_entries) {
+        const u64 actual_entries =
+            std::min(static_cast<u64>(max_entries), entries.size() - next_entry_index);
+        const auto* begin = reinterpret_cast<u8*>(entries.data() + next_entry_index);
+        const auto* end = reinterpret_cast<u8*>(entries.data() + next_entry_index + actual_entries);
+        const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
+        next_entry_index += actual_entries;
+        *out_count = actual_entries;
+        std::memcpy(out_entries, begin, range_size);
+        R_SUCCEED();
+    }
+    Result DoGetEntryCount(s64* out) {
+        *out = entries.size() - next_entry_index;
+        R_SUCCEED();
+    }
+    // TODO: Remove this when VFS is gone
+    template <typename T>
+    void BuildEntryIndex(const std::vector<T>& new_data, DirectoryEntryType type) {
+        entries.reserve(entries.size() + new_data.size());
+        for (const auto& new_entry : new_data) {
+            auto name = new_entry->GetName();
+            if (type == DirectoryEntryType::File && name == GetSaveDataSizeFileName()) {
+                continue;
+            }
+            entries.emplace_back(name, static_cast<s8>(type),
+                                 type == DirectoryEntryType::Directory ? 0 : new_entry->GetSize());
+        }
+    }
+    VirtualDir backend;
+    std::vector<DirectoryEntry> entries;
+    u64 next_entry_index = 0;
+};
+} // namespace FileSys::Fsa
diff --git a/src/core/file_sys/fsa/fs_i_file.h b/src/core/file_sys/fsa/fs_i_file.h
new file mode 100644
index 000000000..1188ae8ca
--- /dev/null
+++ b/src/core/file_sys/fsa/fs_i_file.h
@@ -0,0 +1,167 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "common/overflow.h"
+#include "core/file_sys/errors.h"
+#include "core/file_sys/fs_file.h"
+#include "core/file_sys/fs_filesystem.h"
+#include "core/file_sys/fs_operate_range.h"
+#include "core/file_sys/vfs/vfs.h"
+#include "core/file_sys/vfs/vfs_types.h"
+#include "core/hle/result.h"
+namespace FileSys::Fsa {
+class IFile {
+public:
+    explicit IFile(VirtualFile backend_) : backend(std::move(backend_)) {}
+    virtual ~IFile() {}
+    Result Read(size_t* out, s64 offset, void* buffer, size_t size, const ReadOption& option) {
+        // Check that we have an output pointer
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        // If we have nothing to read, just succeed
+        if (size == 0) {
+            *out = 0;
+            R_SUCCEED();
+        }
+        // Check that the read is valid
+        R_UNLESS(buffer != nullptr, ResultNullptrArgument);
+        R_UNLESS(offset >= 0, ResultOutOfRange);
+        R_UNLESS(Common::CanAddWithoutOverflow<s64>(offset, size), ResultOutOfRange);
+        // Do the read
+        R_RETURN(this->DoRead(out, offset, buffer, size, option));
+    }
+    Result Read(size_t* out, s64 offset, void* buffer, size_t size) {
+        R_RETURN(this->Read(out, offset, buffer, size, ReadOption::None));
+    }
+    Result GetSize(s64* out) {
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        R_RETURN(this->DoGetSize(out));
+    }
+    Result Flush() {
+        R_RETURN(this->DoFlush());
+    }
+    Result Write(s64 offset, const void* buffer, size_t size, const WriteOption& option) {
+        // Handle the zero-size case
+        if (size == 0) {
+            if (option.HasFlushFlag()) {
+                R_TRY(this->Flush());
+            }
+            R_SUCCEED();
+        }
+        // Check the write is valid
+        R_UNLESS(buffer != nullptr, ResultNullptrArgument);
+        R_UNLESS(offset >= 0, ResultOutOfRange);
+        R_UNLESS(Common::CanAddWithoutOverflow<s64>(offset, size), ResultOutOfRange);
+        R_RETURN(this->DoWrite(offset, buffer, size, option));
+    }
+    Result SetSize(s64 size) {
+        R_UNLESS(size >= 0, ResultOutOfRange);
+        R_RETURN(this->DoSetSize(size));
+    }
+    Result OperateRange(void* dst, size_t dst_size, OperationId op_id, s64 offset, s64 size,
+                        const void* src, size_t src_size) {
+        R_RETURN(this->DoOperateRange(dst, dst_size, op_id, offset, size, src, src_size));
+    }
+    Result OperateRange(OperationId op_id, s64 offset, s64 size) {
+        R_RETURN(this->DoOperateRange(nullptr, 0, op_id, offset, size, nullptr, 0));
+    }
+protected:
+    Result DryRead(size_t* out, s64 offset, size_t size, const ReadOption& option,
+                   OpenMode open_mode) {
+        // Check that we can read
+        R_UNLESS(static_cast<u32>(open_mode & OpenMode::Read) != 0, ResultReadNotPermitted);
+        // Get the file size, and validate our offset
+        s64 file_size = 0;
+        R_TRY(this->DoGetSize(std::addressof(file_size)));
+        R_UNLESS(offset <= file_size, ResultOutOfRange);
+        *out = static_cast<size_t>(std::min(file_size - offset, static_cast<s64>(size)));
+        R_SUCCEED();
+    }
+    Result DrySetSize(s64 size, OpenMode open_mode) {
+        // Check that we can write
+        R_UNLESS(static_cast<u32>(open_mode & OpenMode::Write) != 0, ResultWriteNotPermitted);
+        R_SUCCEED();
+    }
+    Result DryWrite(bool* out_append, s64 offset, size_t size, const WriteOption& option,
+                    OpenMode open_mode) {
+        // Check that we can write
+        R_UNLESS(static_cast<u32>(open_mode & OpenMode::Write) != 0, ResultWriteNotPermitted);
+        // Get the file size
+        s64 file_size = 0;
+        R_TRY(this->DoGetSize(&file_size));
+        // Determine if we need to append
+        *out_append = false;
+        if (file_size < offset + static_cast<s64>(size)) {
+            R_UNLESS(static_cast<u32>(open_mode & OpenMode::AllowAppend) != 0,
+                     ResultFileExtensionWithoutOpenModeAllowAppend);
+            *out_append = true;
+        }
+        R_SUCCEED();
+    }
+private:
+    Result DoRead(size_t* out, s64 offset, void* buffer, size_t size, const ReadOption& option) {
+        const auto read_size = backend->Read(static_cast<u8*>(buffer), size, offset);
+        *out = read_size;
+        R_SUCCEED();
+    }
+    Result DoGetSize(s64* out) {
+        *out = backend->GetSize();
+        R_SUCCEED();
+    }
+    Result DoFlush() {
+        // Exists for SDK compatibiltity -- No need to flush file.
+        R_SUCCEED();
+    }
+    Result DoWrite(s64 offset, const void* buffer, size_t size, const WriteOption& option) {
+        const std::size_t written = backend->Write(static_cast<const u8*>(buffer), size, offset);
+        ASSERT_MSG(written == size,
+                   "Could not write all bytes to file (requested={:016X}, actual={:016X}).", size,
+                   written);
+        R_SUCCEED();
+    }
+    Result DoSetSize(s64 size) {
+        backend->Resize(size);
+        R_SUCCEED();
+    }
+    Result DoOperateRange(void* dst, size_t dst_size, OperationId op_id, s64 offset, s64 size,
+                          const void* src, size_t src_size) {
+        R_THROW(ResultNotImplemented);
+    }
+    VirtualFile backend;
+};
+} // namespace FileSys::Fsa
diff --git a/src/core/file_sys/fsa/fs_i_filesystem.h b/src/core/file_sys/fsa/fs_i_filesystem.h
new file mode 100644
index 000000000..8172190f4
--- /dev/null
+++ b/src/core/file_sys/fsa/fs_i_filesystem.h
@@ -0,0 +1,206 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/file_sys/errors.h"
+#include "core/file_sys/fs_filesystem.h"
+#include "core/file_sys/fs_path.h"
+#include "core/file_sys/vfs/vfs_types.h"
+#include "core/hle/result.h"
+#include "core/hle/service/filesystem/filesystem.h"
+namespace FileSys::Fsa {
+class IFile;
+class IDirectory;
+enum class QueryId : u32 {
+    SetConcatenationFileAttribute = 0,
+    UpdateMac = 1,
+    IsSignedSystemPartitionOnSdCardValid = 2,
+    QueryUnpreparedFileInformation = 3,
+};
+class IFileSystem {
+public:
+    explicit IFileSystem(VirtualDir backend_) : backend{std::move(backend_)} {}
+    virtual ~IFileSystem() {}
+    Result CreateFile(const Path& path, s64 size, CreateOption option) {
+        R_UNLESS(size >= 0, ResultOutOfRange);
+        R_RETURN(this->DoCreateFile(path, size, static_cast<int>(option)));
+    }
+    Result CreateFile(const Path& path, s64 size) {
+        R_RETURN(this->CreateFile(path, size, CreateOption::None));
+    }
+    Result DeleteFile(const Path& path) {
+        R_RETURN(this->DoDeleteFile(path));
+    }
+    Result CreateDirectory(const Path& path) {
+        R_RETURN(this->DoCreateDirectory(path));
+    }
+    Result DeleteDirectory(const Path& path) {
+        R_RETURN(this->DoDeleteDirectory(path));
+    }
+    Result DeleteDirectoryRecursively(const Path& path) {
+        R_RETURN(this->DoDeleteDirectoryRecursively(path));
+    }
+    Result RenameFile(const Path& old_path, const Path& new_path) {
+        R_RETURN(this->DoRenameFile(old_path, new_path));
+    }
+    Result RenameDirectory(const Path& old_path, const Path& new_path) {
+        R_RETURN(this->DoRenameDirectory(old_path, new_path));
+    }
+    Result GetEntryType(DirectoryEntryType* out, const Path& path) {
+        R_RETURN(this->DoGetEntryType(out, path));
+    }
+    Result OpenFile(VirtualFile* out_file, const Path& path, OpenMode mode) {
+        R_UNLESS(out_file != nullptr, ResultNullptrArgument);
+        R_UNLESS(static_cast<u32>(mode & OpenMode::ReadWrite) != 0, ResultInvalidOpenMode);
+        R_UNLESS(static_cast<u32>(mode & ~OpenMode::All) == 0, ResultInvalidOpenMode);
+        R_RETURN(this->DoOpenFile(out_file, path, mode));
+    }
+    Result OpenDirectory(VirtualDir* out_dir, const Path& path, OpenDirectoryMode mode) {
+        R_UNLESS(out_dir != nullptr, ResultNullptrArgument);
+        R_UNLESS(static_cast<u64>(mode & OpenDirectoryMode::All) != 0, ResultInvalidOpenMode);
+        R_UNLESS(static_cast<u64>(
+                     mode & ~(OpenDirectoryMode::All | OpenDirectoryMode::NotRequireFileSize)) == 0,
+                 ResultInvalidOpenMode);
+        R_RETURN(this->DoOpenDirectory(out_dir, path, mode));
+    }
+    Result Commit() {
+        R_RETURN(this->DoCommit());
+    }
+    Result GetFreeSpaceSize(s64* out, const Path& path) {
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        R_RETURN(this->DoGetFreeSpaceSize(out, path));
+    }
+    Result GetTotalSpaceSize(s64* out, const Path& path) {
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        R_RETURN(this->DoGetTotalSpaceSize(out, path));
+    }
+    Result CleanDirectoryRecursively(const Path& path) {
+        R_RETURN(this->DoCleanDirectoryRecursively(path));
+    }
+    Result GetFileTimeStampRaw(FileTimeStampRaw* out, const Path& path) {
+        R_UNLESS(out != nullptr, ResultNullptrArgument);
+        R_RETURN(this->DoGetFileTimeStampRaw(out, path));
+    }
+    Result QueryEntry(char* dst, size_t dst_size, const char* src, size_t src_size, QueryId query,
+                      const Path& path) {
+        R_RETURN(this->DoQueryEntry(dst, dst_size, src, src_size, query, path));
+    }
+    // These aren't accessible as commands
+    Result CommitProvisionally(s64 counter) {
+        R_RETURN(this->DoCommitProvisionally(counter));
+    }
+    Result Rollback() {
+        R_RETURN(this->DoRollback());
+    }
+    Result Flush() {
+        R_RETURN(this->DoFlush());
+    }
+private:
+    Result DoCreateFile(const Path& path, s64 size, int flags) {
+        R_RETURN(backend.CreateFile(path.GetString(), size));
+    }
+    Result DoDeleteFile(const Path& path) {
+        R_RETURN(backend.DeleteFile(path.GetString()));
+    }
+    Result DoCreateDirectory(const Path& path) {
+        R_RETURN(backend.CreateDirectory(path.GetString()));
+    }
+    Result DoDeleteDirectory(const Path& path) {
+        R_RETURN(backend.DeleteDirectory(path.GetString()));
+    }
+    Result DoDeleteDirectoryRecursively(const Path& path) {
+        R_RETURN(backend.DeleteDirectoryRecursively(path.GetString()));
+    }
+    Result DoRenameFile(const Path& old_path, const Path& new_path) {
+        R_RETURN(backend.RenameFile(old_path.GetString(), new_path.GetString()));
+    }
+    Result DoRenameDirectory(const Path& old_path, const Path& new_path) {
+        R_RETURN(backend.RenameDirectory(old_path.GetString(), new_path.GetString()));
+    }
+    Result DoGetEntryType(DirectoryEntryType* out, const Path& path) {
+        R_RETURN(backend.GetEntryType(out, path.GetString()));
+    }
+    Result DoOpenFile(VirtualFile* out_file, const Path& path, OpenMode mode) {
+        R_RETURN(backend.OpenFile(out_file, path.GetString(), mode));
+    }
+    Result DoOpenDirectory(VirtualDir* out_directory, const Path& path, OpenDirectoryMode mode) {
+        R_RETURN(backend.OpenDirectory(out_directory, path.GetString()));
+    }
+    Result DoCommit() {
+        R_THROW(ResultNotImplemented);
+    }
+    Result DoGetFreeSpaceSize(s64* out, const Path& path) {
+        R_THROW(ResultNotImplemented);
+    }
+    Result DoGetTotalSpaceSize(s64* out, const Path& path) {
+        R_THROW(ResultNotImplemented);
+    }
+    Result DoCleanDirectoryRecursively(const Path& path) {
+        R_RETURN(backend.CleanDirectoryRecursively(path.GetString()));
+    }
+    Result DoGetFileTimeStampRaw(FileTimeStampRaw* out, const Path& path) {
+        R_RETURN(backend.GetFileTimeStampRaw(out, path.GetString()));
+    }
+    Result DoQueryEntry(char* dst, size_t dst_size, const char* src, size_t src_size, QueryId query,
+                        const Path& path) {
+        R_THROW(ResultNotImplemented);
+    }
+    // These aren't accessible as commands
+    Result DoCommitProvisionally(s64 counter) {
+        R_THROW(ResultNotImplemented);
+    }
+    Result DoRollback() {
+        R_THROW(ResultNotImplemented);
+    }
+    Result DoFlush() {
+        R_THROW(ResultNotImplemented);
+    }
+    Service::FileSystem::VfsDirectoryServiceWrapper backend;
+};
+} // namespace FileSys::Fsa
diff --git a/src/core/file_sys/fssrv/fssrv_sf_path.h b/src/core/file_sys/fssrv/fssrv_sf_path.h
new file mode 100644
index 000000000..a0c0b2dac
--- /dev/null
+++ b/src/core/file_sys/fssrv/fssrv_sf_path.h
@@ -0,0 +1,36 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/file_sys/fs_directory.h"
+namespace FileSys::Sf {
+struct Path {
+    char str[EntryNameLengthMax + 1];
+    static constexpr Path Encode(const char* p) {
+        Path path = {};
+        for (size_t i = 0; i < sizeof(path) - 1; i++) {
+            path.str[i] = p[i];
+            if (p[i] == '\x00') {
+                break;
+            }
+        }
+        return path;
+    }
+    static constexpr size_t GetPathLength(const Path& path) {
+        size_t len = 0;
+        for (size_t i = 0; i < sizeof(path) - 1 && path.str[i] != '\x00'; i++) {
+            len++;
+        }
+        return len;
+    }
+};
+static_assert(std::is_trivially_copyable_v<Path>, "Path must be trivially copyable.");
+using FspPath = Path;
+} // namespace FileSys::Sf
diff --git a/src/core/file_sys/savedata_factory.cpp b/src/core/file_sys/savedata_factory.cpp
index cbf411a20..106922e04 100644
--- a/src/core/file_sys/savedata_factory.cpp
+++ b/src/core/file_sys/savedata_factory.cpp
@@ -14,48 +14,11 @@ namespace FileSys {
 namespace {
-void PrintSaveDataAttributeWarnings(SaveDataAttribute meta) {
-    if (meta.type == SaveDataType::SystemSaveData || meta.type == SaveDataType::SaveData) {
-        if (meta.zero_1 != 0) {
-            LOG_WARNING(Service_FS,
-                        "Possibly incorrect SaveDataAttribute, type is "
-                        "SystemSaveData||SaveData but offset 0x28 is non-zero ({:016X}).",
-                        meta.zero_1);
-        }
-        if (meta.zero_2 != 0) {
-            LOG_WARNING(Service_FS,
-                        "Possibly incorrect SaveDataAttribute, type is "
-                        "SystemSaveData||SaveData but offset 0x30 is non-zero ({:016X}).",
-                        meta.zero_2);
-        }
-        if (meta.zero_3 != 0) {
-            LOG_WARNING(Service_FS,
-                        "Possibly incorrect SaveDataAttribute, type is "
-                        "SystemSaveData||SaveData but offset 0x38 is non-zero ({:016X}).",
-                        meta.zero_3);
-        }
-    }
-    if (meta.type == SaveDataType::SystemSaveData && meta.title_id != 0) {
-        LOG_WARNING(Service_FS,
-                    "Possibly incorrect SaveDataAttribute, type is SystemSaveData but title_id is "
-                    "non-zero ({:016X}).",
-                    meta.title_id);
-    }
-    if (meta.type == SaveDataType::DeviceSaveData && meta.user_id != u128{0, 0}) {
-        LOG_WARNING(Service_FS,
-                    "Possibly incorrect SaveDataAttribute, type is DeviceSaveData but user_id is "
-                    "non-zero ({:016X}{:016X})",
-                    meta.user_id[1], meta.user_id[0]);
-    }
-}
 bool ShouldSaveDataBeAutomaticallyCreated(SaveDataSpaceId space, const SaveDataAttribute& attr) {
-    return attr.type == SaveDataType::CacheStorage || attr.type == SaveDataType::TemporaryStorage ||
+    return attr.type == SaveDataType::Cache || attr.type == SaveDataType::Temporary ||
-           (space == SaveDataSpaceId::NandUser && ///< Normal Save Data -- Current Title & User
+           (space == SaveDataSpaceId::User && ///< Normal Save Data -- Current Title & User
-            (attr.type == SaveDataType::SaveData || attr.type == SaveDataType::DeviceSaveData) &&
+            (attr.type == SaveDataType::Account || attr.type == SaveDataType::Device) &&
-            attr.title_id == 0 && attr.save_id == 0);
+            attr.program_id == 0 && attr.system_save_data_id == 0);
 }
 std::string GetFutureSaveDataPath(SaveDataSpaceId space_id, SaveDataType type, u64 title_id,
@@ -63,7 +26,7 @@ std::string GetFutureSaveDataPath(SaveDataSpaceId space_id, SaveDataType type, u
    // Only detect nand user saves.
    const auto space_id_path = [space_id]() -> std::string_view {
        switch (space_id) {
-        case SaveDataSpaceId::NandUser:
+        case SaveDataSpaceId::User:
            return "/user/save";
        default:
            return "";
@@ -79,9 +42,9 @@ std::string GetFutureSaveDataPath(SaveDataSpaceId space_id, SaveDataType type, u
    // Only detect account/device saves from the future location.
    switch (type) {
-    case SaveDataType::SaveData:
+    case SaveDataType::Account:
        return fmt::format("{}/account/{}/{:016X}/0", space_id_path, uuid.RawString(), title_id);
-    case SaveDataType::DeviceSaveData:
+    case SaveDataType::Device:
        return fmt::format("{}/device/{:016X}/0", space_id_path, title_id);
    default:
        return "";
@@ -90,13 +53,6 @@ std::string GetFutureSaveDataPath(SaveDataSpaceId space_id, SaveDataType type, u
 } // Anonymous namespace
-std::string SaveDataAttribute::DebugInfo() const {
-    return fmt::format("[title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}, type={:02X}, "
-                       "rank={}, index={}]",
-                       title_id, user_id[1], user_id[0], save_id, static_cast<u8>(type),
-                       static_cast<u8>(rank), index);
-}
 SaveDataFactory::SaveDataFactory(Core::System& system_, ProgramId program_id_,
                                 VirtualDir save_directory_)
    : system{system_}, program_id{program_id_}, dir{std::move(save_directory_)} {
@@ -108,18 +64,16 @@ SaveDataFactory::SaveDataFactory(Core::System& system_, ProgramId program_id_,
 SaveDataFactory::~SaveDataFactory() = default;
 VirtualDir SaveDataFactory::Create(SaveDataSpaceId space, const SaveDataAttribute& meta) const {
-    PrintSaveDataAttributeWarnings(meta);
+    const auto save_directory = GetFullPath(program_id, dir, space, meta.type, meta.program_id,
+                                            meta.user_id, meta.system_save_data_id);
-    const auto save_directory =
-        GetFullPath(program_id, dir, space, meta.type, meta.title_id, meta.user_id, meta.save_id);
    return dir->CreateDirectoryRelative(save_directory);
 }
 VirtualDir SaveDataFactory::Open(SaveDataSpaceId space, const SaveDataAttribute& meta) const {
-    const auto save_directory =
+    const auto save_directory = GetFullPath(program_id, dir, space, meta.type, meta.program_id,
-        GetFullPath(program_id, dir, space, meta.type, meta.title_id, meta.user_id, meta.save_id);
+                                            meta.user_id, meta.system_save_data_id);
    auto out = dir->GetDirectoryRelative(save_directory);
@@ -136,11 +90,11 @@ VirtualDir SaveDataFactory::GetSaveDataSpaceDirectory(SaveDataSpaceId space) con
 std::string SaveDataFactory::GetSaveDataSpaceIdPath(SaveDataSpaceId space) {
    switch (space) {
-    case SaveDataSpaceId::NandSystem:
+    case SaveDataSpaceId::System:
        return "/system/";
-    case SaveDataSpaceId::NandUser:
+    case SaveDataSpaceId::User:
        return "/user/";
-    case SaveDataSpaceId::TemporaryStorage:
+    case SaveDataSpaceId::Temporary:
        return "/temp/";
    default:
        ASSERT_MSG(false, "Unrecognized SaveDataSpaceId: {:02X}", static_cast<u8>(space));
@@ -153,7 +107,7 @@ std::string SaveDataFactory::GetFullPath(ProgramId program_id, VirtualDir dir,
                                         u128 user_id, u64 save_id) {
    // According to switchbrew, if a save is of type SaveData and the title id field is 0, it should
    // be interpreted as the title id of the current process.
-    if (type == SaveDataType::SaveData || type == SaveDataType::DeviceSaveData) {
+    if (type == SaveDataType::Account || type == SaveDataType::Device) {
        if (title_id == 0) {
            title_id = program_id;
        }
@@ -173,16 +127,16 @@ std::string SaveDataFactory::GetFullPath(ProgramId program_id, VirtualDir dir,
    std::string out = GetSaveDataSpaceIdPath(space);
    switch (type) {
-    case SaveDataType::SystemSaveData:
+    case SaveDataType::System:
        return fmt::format("{}save/{:016X}/{:016X}{:016X}", out, save_id, user_id[1], user_id[0]);
-    case SaveDataType::SaveData:
+    case SaveDataType::Account:
-    case SaveDataType::DeviceSaveData:
+    case SaveDataType::Device:
        return fmt::format("{}save/{:016X}/{:016X}{:016X}/{:016X}", out, 0, user_id[1], user_id[0],
                           title_id);
-    case SaveDataType::TemporaryStorage:
+    case SaveDataType::Temporary:
        return fmt::format("{}{:016X}/{:016X}{:016X}/{:016X}", out, 0, user_id[1], user_id[0],
                           title_id);
-    case SaveDataType::CacheStorage:
+    case SaveDataType::Cache:
        return fmt::format("{}save/cache/{:016X}", out, title_id);
    default:
        ASSERT_MSG(false, "Unrecognized SaveDataType: {:02X}", static_cast<u8>(type));
@@ -202,7 +156,7 @@ std::string SaveDataFactory::GetUserGameSaveDataRoot(u128 user_id, bool future)
 SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
                                               u128 user_id) const {
    const auto path =
-        GetFullPath(program_id, dir, SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+        GetFullPath(program_id, dir, SaveDataSpaceId::User, type, title_id, user_id, 0);
    const auto relative_dir = GetOrCreateDirectoryRelative(dir, path);
    const auto size_file = relative_dir->GetFile(GetSaveDataSizeFileName());
@@ -221,7 +175,7 @@ SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
 void SaveDataFactory::WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id,
                                        SaveDataSize new_value) const {
    const auto path =
-        GetFullPath(program_id, dir, SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+        GetFullPath(program_id, dir, SaveDataSpaceId::User, type, title_id, user_id, 0);
    const auto relative_dir = GetOrCreateDirectoryRelative(dir, path);
    const auto size_file = relative_dir->CreateFile(GetSaveDataSizeFileName());
diff --git a/src/core/file_sys/savedata_factory.h b/src/core/file_sys/savedata_factory.h
index 5ab7e4d32..15dd4ec7d 100644
--- a/src/core/file_sys/savedata_factory.h
+++ b/src/core/file_sys/savedata_factory.h
@@ -7,6 +7,7 @@
 #include <string>
 #include "common/common_funcs.h"
 #include "common/common_types.h"
+#include "core/file_sys/fs_save_data_types.h"
 #include "core/file_sys/vfs/vfs.h"
 #include "core/hle/result.h"
@@ -16,73 +17,6 @@ class System;
 namespace FileSys {
-enum class SaveDataSpaceId : u8 {
-    NandSystem = 0,
-    NandUser = 1,
-    SdCardSystem = 2,
-    TemporaryStorage = 3,
-    SdCardUser = 4,
-    ProperSystem = 100,
-    SafeMode = 101,
-};
-enum class SaveDataType : u8 {
-    SystemSaveData = 0,
-    SaveData = 1,
-    BcatDeliveryCacheStorage = 2,
-    DeviceSaveData = 3,
-    TemporaryStorage = 4,
-    CacheStorage = 5,
-    SystemBcat = 6,
-};
-enum class SaveDataRank : u8 {
-    Primary = 0,
-    Secondary = 1,
-};
-enum class SaveDataFlags : u32 {
-    None = (0 << 0),
-    KeepAfterResettingSystemSaveData = (1 << 0),
-    KeepAfterRefurbishment = (1 << 1),
-    KeepAfterResettingSystemSaveDataWithoutUserSaveData = (1 << 2),
-    NeedsSecureDelete = (1 << 3),
-};
-struct SaveDataAttribute {
-    u64 title_id;
-    u128 user_id;
-    u64 save_id;
-    SaveDataType type;
-    SaveDataRank rank;
-    u16 index;
-    INSERT_PADDING_BYTES_NOINIT(4);
-    u64 zero_1;
-    u64 zero_2;
-    u64 zero_3;
-    std::string DebugInfo() const;
-};
-static_assert(sizeof(SaveDataAttribute) == 0x40, "SaveDataAttribute has incorrect size.");
-struct SaveDataExtraData {
-    SaveDataAttribute attr;
-    u64 owner_id;
-    s64 timestamp;
-    SaveDataFlags flags;
-    INSERT_PADDING_BYTES_NOINIT(4);
-    s64 available_size;
-    s64 journal_size;
-    s64 commit_id;
-    std::array<u8, 0x190> unused;
-};
-static_assert(sizeof(SaveDataExtraData) == 0x200, "SaveDataExtraData has incorrect size.");
-struct SaveDataSize {
-    u64 normal;
-    u64 journal;
-};
 constexpr const char* GetSaveDataSizeFileName() {
    return ".yuzu_save_size";
 }
diff --git a/src/core/hle/service/am/service/application_functions.cpp b/src/core/hle/service/am/service/application_functions.cpp
index cb53b07e0..bfccb6b09 100644
--- a/src/core/hle/service/am/service/application_functions.cpp
+++ b/src/core/hle/service/am/service/application_functions.cpp
@@ -123,13 +123,13 @@ Result IApplicationFunctions::EnsureSaveData(Out<u64> out_size, Common::UUID use
    LOG_INFO(Service_AM, "called, uid={}", user_id.FormattedString());
    FileSys::SaveDataAttribute attribute{};
-    attribute.title_id = m_applet->program_id;
+    attribute.program_id = m_applet->program_id;
    attribute.user_id = user_id.AsU128();
-    attribute.type = FileSys::SaveDataType::SaveData;
+    attribute.type = FileSys::SaveDataType::Account;
    FileSys::VirtualDir save_data{};
    R_TRY(system.GetFileSystemController().OpenSaveDataController()->CreateSaveData(
-        &save_data, FileSys::SaveDataSpaceId::NandUser, attribute));
+        &save_data, FileSys::SaveDataSpaceId::User, attribute));
    *out_size = 0;
    R_SUCCEED();
diff --git a/src/core/hle/service/audio/audin_u.cpp b/src/core/hle/service/audio/audin_u.cpp
deleted file mode 100644
index de2aa6906..000000000
--- a/src/core/hle/service/audio/audin_u.cpp
+++ /dev/null
@@ -1,393 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#include "audio_core/in/audio_in_system.h"
-#include "audio_core/renderer/audio_device.h"
-#include "common/common_funcs.h"
-#include "common/logging/log.h"
-#include "common/scratch_buffer.h"
-#include "common/string_util.h"
-#include "core/core.h"
-#include "core/hle/kernel/k_event.h"
-#include "core/hle/service/audio/audin_u.h"
-#include "core/hle/service/ipc_helpers.h"
-namespace Service::Audio {
-using namespace AudioCore::AudioIn;
-class IAudioIn final : public ServiceFramework<IAudioIn> {
-public:
-    explicit IAudioIn(Core::System& system_, Manager& manager, size_t session_id,
-                      const std::string& device_name, const AudioInParameter& in_params,
-                      Kernel::KProcess* handle, u64 applet_resource_user_id)
-        : ServiceFramework{system_, "IAudioIn"},
-          service_context{system_, "IAudioIn"}, event{service_context.CreateEvent("AudioInEvent")},
-          process{handle}, impl{std::make_shared<In>(system_, manager, event, session_id)} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, &IAudioIn::GetAudioInState, "GetAudioInState"},
-            {1, &IAudioIn::Start, "Start"},
-            {2, &IAudioIn::Stop, "Stop"},
-            {3, &IAudioIn::AppendAudioInBuffer, "AppendAudioInBuffer"},
-            {4, &IAudioIn::RegisterBufferEvent, "RegisterBufferEvent"},
-            {5, &IAudioIn::GetReleasedAudioInBuffer, "GetReleasedAudioInBuffer"},
-            {6, &IAudioIn::ContainsAudioInBuffer, "ContainsAudioInBuffer"},
-            {7, &IAudioIn::AppendAudioInBuffer, "AppendUacInBuffer"},
-            {8, &IAudioIn::AppendAudioInBuffer, "AppendAudioInBufferAuto"},
-            {9, &IAudioIn::GetReleasedAudioInBuffer, "GetReleasedAudioInBuffersAuto"},
-            {10, &IAudioIn::AppendAudioInBuffer, "AppendUacInBufferAuto"},
-            {11, &IAudioIn::GetAudioInBufferCount, "GetAudioInBufferCount"},
-            {12, &IAudioIn::SetDeviceGain, "SetDeviceGain"},
-            {13, &IAudioIn::GetDeviceGain, "GetDeviceGain"},
-            {14, &IAudioIn::FlushAudioInBuffers, "FlushAudioInBuffers"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-        process->Open();
-        if (impl->GetSystem()
-                .Initialize(device_name, in_params, handle, applet_resource_user_id)
-                .IsError()) {
-            LOG_ERROR(Service_Audio, "Failed to initialize the AudioIn System!");
-        }
-    }
-    ~IAudioIn() override {
-        impl->Free();
-        service_context.CloseEvent(event);
-        process->Close();
-    }
-    [[nodiscard]] std::shared_ptr<In> GetImpl() {
-        return impl;
-    }
-private:
-    void GetAudioInState(HLERequestContext& ctx) {
-        const auto state = static_cast<u32>(impl->GetState());
-        LOG_DEBUG(Service_Audio, "called. State={}", state);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(state);
-    }
-    void Start(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto result = impl->StartSystem();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void Stop(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto result = impl->StopSystem();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void AppendAudioInBuffer(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        u64 tag = rp.PopRaw<u64>();
-        const auto in_buffer_size{ctx.GetReadBufferSize()};
-        if (in_buffer_size < sizeof(AudioInBuffer)) {
-            LOG_ERROR(Service_Audio, "Input buffer is too small for an AudioInBuffer!");
-        }
-        const auto& in_buffer = ctx.ReadBuffer();
-        AudioInBuffer buffer{};
-        std::memcpy(&buffer, in_buffer.data(), sizeof(AudioInBuffer));
-        [[maybe_unused]] auto sessionid{impl->GetSystem().GetSessionId()};
-        LOG_TRACE(Service_Audio, "called. Session {} Appending buffer {:08X}", sessionid, tag);
-        auto result = impl->AppendBuffer(buffer, tag);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void RegisterBufferEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto& buffer_event = impl->GetBufferEvent();
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(buffer_event);
-    }
-    void GetReleasedAudioInBuffer(HLERequestContext& ctx) {
-        const auto write_buffer_size = ctx.GetWriteBufferNumElements<u64>();
-        released_buffer.resize_destructive(write_buffer_size);
-        released_buffer[0] = 0;
-        const auto count = impl->GetReleasedBuffers(released_buffer);
-        LOG_TRACE(Service_Audio, "called. Session {} released {} buffers",
-                  impl->GetSystem().GetSessionId(), count);
-        ctx.WriteBuffer(released_buffer);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(count);
-    }
-    void ContainsAudioInBuffer(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        const u64 tag{rp.Pop<u64>()};
-        const auto buffer_queued{impl->ContainsAudioBuffer(tag)};
-        LOG_DEBUG(Service_Audio, "called. Is buffer {:08X} registered? {}", tag, buffer_queued);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(buffer_queued);
-    }
-    void GetAudioInBufferCount(HLERequestContext& ctx) {
-        const auto buffer_count = impl->GetBufferCount();
-        LOG_DEBUG(Service_Audio, "called. Buffer count={}", buffer_count);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(buffer_count);
-    }
-    void SetDeviceGain(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        const auto volume{rp.Pop<f32>()};
-        LOG_DEBUG(Service_Audio, "called. Gain {}", volume);
-        impl->SetVolume(volume);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void GetDeviceGain(HLERequestContext& ctx) {
-        auto volume{impl->GetVolume()};
-        LOG_DEBUG(Service_Audio, "called. Gain {}", volume);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(volume);
-    }
-    void FlushAudioInBuffers(HLERequestContext& ctx) {
-        bool flushed{impl->FlushAudioInBuffers()};
-        LOG_DEBUG(Service_Audio, "called. Were any buffers flushed? {}", flushed);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(flushed);
-    }
-    KernelHelpers::ServiceContext service_context;
-    Kernel::KEvent* event;
-    Kernel::KProcess* process;
-    std::shared_ptr<AudioCore::AudioIn::In> impl;
-    Common::ScratchBuffer<u64> released_buffer;
-};
-AudInU::AudInU(Core::System& system_)
-    : ServiceFramework{system_, "audin:u"}, service_context{system_, "AudInU"},
-      impl{std::make_unique<AudioCore::AudioIn::Manager>(system_)} {
-    // clang-format off
-    static const FunctionInfo functions[] = {
-        {0, &AudInU::ListAudioIns, "ListAudioIns"},
-        {1, &AudInU::OpenAudioIn, "OpenAudioIn"},
-        {2, &AudInU::ListAudioIns, "ListAudioInsAuto"},
-        {3, &AudInU::OpenAudioIn, "OpenAudioInAuto"},
-        {4, &AudInU::ListAudioInsAutoFiltered, "ListAudioInsAutoFiltered"},
-        {5, &AudInU::OpenAudioInProtocolSpecified, "OpenAudioInProtocolSpecified"},
-    };
-    // clang-format on
-    RegisterHandlers(functions);
-}
-AudInU::~AudInU() = default;
-void AudInU::ListAudioIns(HLERequestContext& ctx) {
-    using namespace AudioCore::Renderer;
-    LOG_DEBUG(Service_Audio, "called");
-    const auto write_count =
-        static_cast<u32>(ctx.GetWriteBufferNumElements<AudioDevice::AudioDeviceName>());
-    std::vector<AudioDevice::AudioDeviceName> device_names{};
-    u32 out_count{0};
-    if (write_count > 0) {
-        out_count = impl->GetDeviceNames(device_names, write_count, false);
-        ctx.WriteBuffer(device_names);
-    }
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(ResultSuccess);
-    rb.Push(out_count);
-}
-void AudInU::ListAudioInsAutoFiltered(HLERequestContext& ctx) {
-    using namespace AudioCore::Renderer;
-    LOG_DEBUG(Service_Audio, "called");
-    const auto write_count =
-        static_cast<u32>(ctx.GetWriteBufferNumElements<AudioDevice::AudioDeviceName>());
-    std::vector<AudioDevice::AudioDeviceName> device_names{};
-    u32 out_count{0};
-    if (write_count > 0) {
-        out_count = impl->GetDeviceNames(device_names, write_count, true);
-        ctx.WriteBuffer(device_names);
-    }
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(ResultSuccess);
-    rb.Push(out_count);
-}
-void AudInU::OpenAudioIn(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto in_params{rp.PopRaw<AudioInParameter>()};
-    auto applet_resource_user_id{rp.PopRaw<u64>()};
-    const auto device_name_data{ctx.ReadBuffer()};
-    auto device_name = Common::StringFromBuffer(device_name_data);
-    auto handle{ctx.GetCopyHandle(0)};
-    auto process{ctx.GetObjectFromHandle<Kernel::KProcess>(handle)};
-    if (process.IsNull()) {
-        LOG_ERROR(Service_Audio, "Failed to get process handle");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultUnknown);
-        return;
-    }
-    std::scoped_lock l{impl->mutex};
-    auto link{impl->LinkToManager()};
-    if (link.IsError()) {
-        LOG_ERROR(Service_Audio, "Failed to link Audio In to Audio Manager");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(link);
-        return;
-    }
-    size_t new_session_id{};
-    auto result{impl->AcquireSessionId(new_session_id)};
-    if (result.IsError()) {
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    LOG_DEBUG(Service_Audio, "Opening new AudioIn, sessionid={}, free sessions={}", new_session_id,
-              impl->num_free_sessions);
-    auto audio_in =
-        std::make_shared<IAudioIn>(system, *impl, new_session_id, device_name, in_params,
-                                   process.GetPointerUnsafe(), applet_resource_user_id);
-    impl->sessions[new_session_id] = audio_in->GetImpl();
-    impl->applet_resource_user_ids[new_session_id] = applet_resource_user_id;
-    auto& out_system = impl->sessions[new_session_id]->GetSystem();
-    AudioInParameterInternal out_params{.sample_rate = out_system.GetSampleRate(),
-                                        .channel_count = out_system.GetChannelCount(),
-                                        .sample_format =
-                                            static_cast<u32>(out_system.GetSampleFormat()),
-                                        .state = static_cast<u32>(out_system.GetState())};
-    IPC::ResponseBuilder rb{ctx, 6, 0, 1};
-    std::string out_name{out_system.GetName()};
-    ctx.WriteBuffer(out_name);
-    rb.Push(ResultSuccess);
-    rb.PushRaw<AudioInParameterInternal>(out_params);
-    rb.PushIpcInterface<IAudioIn>(audio_in);
-}
-void AudInU::OpenAudioInProtocolSpecified(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto protocol_specified{rp.PopRaw<u64>()};
-    auto in_params{rp.PopRaw<AudioInParameter>()};
-    auto applet_resource_user_id{rp.PopRaw<u64>()};
-    const auto device_name_data{ctx.ReadBuffer()};
-    auto device_name = Common::StringFromBuffer(device_name_data);
-    auto handle{ctx.GetCopyHandle(0)};
-    auto process{ctx.GetObjectFromHandle<Kernel::KProcess>(handle)};
-    if (process.IsNull()) {
-        LOG_ERROR(Service_Audio, "Failed to get process handle");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultUnknown);
-        return;
-    }
-    std::scoped_lock l{impl->mutex};
-    auto link{impl->LinkToManager()};
-    if (link.IsError()) {
-        LOG_ERROR(Service_Audio, "Failed to link Audio In to Audio Manager");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(link);
-        return;
-    }
-    size_t new_session_id{};
-    auto result{impl->AcquireSessionId(new_session_id)};
-    if (result.IsError()) {
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    LOG_DEBUG(Service_Audio, "Opening new AudioIn, sessionid={}, free sessions={}", new_session_id,
-              impl->num_free_sessions);
-    auto audio_in =
-        std::make_shared<IAudioIn>(system, *impl, new_session_id, device_name, in_params,
-                                   process.GetPointerUnsafe(), applet_resource_user_id);
-    impl->sessions[new_session_id] = audio_in->GetImpl();
-    impl->applet_resource_user_ids[new_session_id] = applet_resource_user_id;
-    auto& out_system = impl->sessions[new_session_id]->GetSystem();
-    AudioInParameterInternal out_params{.sample_rate = out_system.GetSampleRate(),
-                                        .channel_count = out_system.GetChannelCount(),
-                                        .sample_format =
-                                            static_cast<u32>(out_system.GetSampleFormat()),
-                                        .state = static_cast<u32>(out_system.GetState())};
-    IPC::ResponseBuilder rb{ctx, 6, 0, 1};
-    std::string out_name{out_system.GetName()};
-    if (protocol_specified == 0) {
-        if (out_system.IsUac()) {
-            out_name = "UacIn";
-        } else {
-            out_name = "DeviceIn";
-        }
-    }
-    ctx.WriteBuffer(out_name);
-    rb.Push(ResultSuccess);
-    rb.PushRaw<AudioInParameterInternal>(out_params);
-    rb.PushIpcInterface<IAudioIn>(audio_in);
-}
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audin_u.h b/src/core/hle/service/audio/audin_u.h
deleted file mode 100644
index 51e770ff9..000000000
--- a/src/core/hle/service/audio/audin_u.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#pragma once
-#include "audio_core/audio_in_manager.h"
-#include "audio_core/in/audio_in.h"
-#include "core/hle/service/kernel_helpers.h"
-#include "core/hle/service/service.h"
-namespace Core {
-class System;
-}
-namespace AudioCore::AudioOut {
-class Manager;
-class In;
-} // namespace AudioCore::AudioOut
-namespace Service::Audio {
-class AudInU final : public ServiceFramework<AudInU> {
-public:
-    explicit AudInU(Core::System& system_);
-    ~AudInU() override;
-private:
-    void ListAudioIns(HLERequestContext& ctx);
-    void ListAudioInsAutoFiltered(HLERequestContext& ctx);
-    void OpenInOutImpl(HLERequestContext& ctx);
-    void OpenAudioIn(HLERequestContext& ctx);
-    void OpenAudioInProtocolSpecified(HLERequestContext& ctx);
-    KernelHelpers::ServiceContext service_context;
-    std::unique_ptr<AudioCore::AudioIn::Manager> impl;
-};
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio.cpp b/src/core/hle/service/audio/audio.cpp
index 44af030eb..331176bf7 100644
--- a/src/core/hle/service/audio/audio.cpp
+++ b/src/core/hle/service/audio/audio.cpp
@@ -2,14 +2,14 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "core/core.h"
-#include "core/hle/service/audio/audin_u.h"
 #include "core/hle/service/audio/audio.h"
 #include "core/hle/service/audio/audio_controller.h"
-#include "core/hle/service/audio/audout_u.h"
+#include "core/hle/service/audio/audio_in_manager.h"
-#include "core/hle/service/audio/audrec_a.h"
+#include "core/hle/service/audio/audio_out_manager.h"
-#include "core/hle/service/audio/audrec_u.h"
+#include "core/hle/service/audio/audio_renderer_manager.h"
-#include "core/hle/service/audio/audren_u.h"
+#include "core/hle/service/audio/final_output_recorder_manager.h"
-#include "core/hle/service/audio/hwopus.h"
+#include "core/hle/service/audio/final_output_recorder_manager_for_applet.h"
+#include "core/hle/service/audio/hardware_opus_decoder_manager.h"
 #include "core/hle/service/server_manager.h"
 #include "core/hle/service/service.h"
@@ -19,12 +19,16 @@ void LoopProcess(Core::System& system) {
    auto server_manager = std::make_unique<ServerManager>(system);
    server_manager->RegisterNamedService("audctl", std::make_shared<IAudioController>(system));
-    server_manager->RegisterNamedService("audout:u", std::make_shared<AudOutU>(system));
+    server_manager->RegisterNamedService("audin:u", std::make_shared<IAudioInManager>(system));
-    server_manager->RegisterNamedService("audin:u", std::make_shared<AudInU>(system));
+    server_manager->RegisterNamedService("audout:u", std::make_shared<IAudioOutManager>(system));
-    server_manager->RegisterNamedService("audrec:a", std::make_shared<AudRecA>(system));
+    server_manager->RegisterNamedService(
-    server_manager->RegisterNamedService("audrec:u", std::make_shared<AudRecU>(system));
+        "audrec:a", std::make_shared<IFinalOutputRecorderManagerForApplet>(system));
-    server_manager->RegisterNamedService("audren:u", std::make_shared<AudRenU>(system));
+    server_manager->RegisterNamedService("audrec:u",
-    server_manager->RegisterNamedService("hwopus", std::make_shared<HwOpus>(system));
+                                         std::make_shared<IFinalOutputRecorderManager>(system));
+    server_manager->RegisterNamedService("audren:u",
+                                         std::make_shared<IAudioRendererManager>(system));
+    server_manager->RegisterNamedService("hwopus",
+                                         std::make_shared<IHardwareOpusDecoderManager>(system));
    ServerManager::RunServer(std::move(server_manager));
 }
diff --git a/src/core/hle/service/audio/audio_controller.cpp b/src/core/hle/service/audio/audio_controller.cpp
index a6da66d0f..c9804cf9c 100644
--- a/src/core/hle/service/audio/audio_controller.cpp
+++ b/src/core/hle/service/audio/audio_controller.cpp
@@ -16,27 +16,27 @@ IAudioController::IAudioController(Core::System& system_)
    static const FunctionInfo functions[] = {
        {0, nullptr, "GetTargetVolume"},
        {1, nullptr, "SetTargetVolume"},
-        {2, C<&IAudioController::GetTargetVolumeMin>, "GetTargetVolumeMin"},
+        {2, D<&IAudioController::GetTargetVolumeMin>, "GetTargetVolumeMin"},
-        {3, C<&IAudioController::GetTargetVolumeMax>, "GetTargetVolumeMax"},
+        {3, D<&IAudioController::GetTargetVolumeMax>, "GetTargetVolumeMax"},
        {4, nullptr, "IsTargetMute"},
        {5, nullptr, "SetTargetMute"},
        {6, nullptr, "IsTargetConnected"},
        {7, nullptr, "SetDefaultTarget"},
        {8, nullptr, "GetDefaultTarget"},
-        {9, C<&IAudioController::GetAudioOutputMode>, "GetAudioOutputMode"},
+        {9, D<&IAudioController::GetAudioOutputMode>, "GetAudioOutputMode"},
-        {10, C<&IAudioController::SetAudioOutputMode>, "SetAudioOutputMode"},
+        {10, D<&IAudioController::SetAudioOutputMode>, "SetAudioOutputMode"},
        {11, nullptr, "SetForceMutePolicy"},
-        {12, C<&IAudioController::GetForceMutePolicy>, "GetForceMutePolicy"},
+        {12, D<&IAudioController::GetForceMutePolicy>, "GetForceMutePolicy"},
-        {13, C<&IAudioController::GetOutputModeSetting>, "GetOutputModeSetting"},
+        {13, D<&IAudioController::GetOutputModeSetting>, "GetOutputModeSetting"},
-        {14, C<&IAudioController::SetOutputModeSetting>, "SetOutputModeSetting"},
+        {14, D<&IAudioController::SetOutputModeSetting>, "SetOutputModeSetting"},
        {15, nullptr, "SetOutputTarget"},
        {16, nullptr, "SetInputTargetForceEnabled"},
-        {17, C<&IAudioController::SetHeadphoneOutputLevelMode>, "SetHeadphoneOutputLevelMode"},
+        {17, D<&IAudioController::SetHeadphoneOutputLevelMode>, "SetHeadphoneOutputLevelMode"},
-        {18, C<&IAudioController::GetHeadphoneOutputLevelMode>, "GetHeadphoneOutputLevelMode"},
+        {18, D<&IAudioController::GetHeadphoneOutputLevelMode>, "GetHeadphoneOutputLevelMode"},
        {19, nullptr, "AcquireAudioVolumeUpdateEventForPlayReport"},
        {20, nullptr, "AcquireAudioOutputDeviceUpdateEventForPlayReport"},
        {21, nullptr, "GetAudioOutputTargetForPlayReport"},
-        {22, nullptr, "NotifyHeadphoneVolumeWarningDisplayedEvent"},
+        {22, D<&IAudioController::NotifyHeadphoneVolumeWarningDisplayedEvent>, "NotifyHeadphoneVolumeWarningDisplayedEvent"},
        {23, nullptr, "SetSystemOutputMasterVolume"},
        {24, nullptr, "GetSystemOutputMasterVolume"},
        {25, nullptr, "GetAudioVolumeDataForPlayReport"},
@@ -44,11 +44,11 @@ IAudioController::IAudioController(Core::System& system_)
        {27, nullptr, "SetVolumeMappingTableForDev"},
        {28, nullptr, "GetAudioOutputChannelCountForPlayReport"},
        {29, nullptr, "BindAudioOutputChannelCountUpdateEventForPlayReport"},
-        {30, C<&IAudioController::SetSpeakerAutoMuteEnabled>, "SetSpeakerAutoMuteEnabled"},
+        {30, D<&IAudioController::SetSpeakerAutoMuteEnabled>, "SetSpeakerAutoMuteEnabled"},
-        {31, C<&IAudioController::IsSpeakerAutoMuteEnabled>, "IsSpeakerAutoMuteEnabled"},
+        {31, D<&IAudioController::IsSpeakerAutoMuteEnabled>, "IsSpeakerAutoMuteEnabled"},
        {32, nullptr, "GetActiveOutputTarget"},
        {33, nullptr, "GetTargetDeviceInfo"},
-        {34, C<&IAudioController::AcquireTargetNotification>, "AcquireTargetNotification"},
+        {34, D<&IAudioController::AcquireTargetNotification>, "AcquireTargetNotification"},
        {35, nullptr, "SetHearingProtectionSafeguardTimerRemainingTimeForDebug"},
        {36, nullptr, "GetHearingProtectionSafeguardTimerRemainingTimeForDebug"},
        {37, nullptr, "SetHearingProtectionSafeguardEnabled"},
@@ -150,6 +150,11 @@ Result IAudioController::GetHeadphoneOutputLevelMode(
    R_SUCCEED();
 }
+Result IAudioController::NotifyHeadphoneVolumeWarningDisplayedEvent() {
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    R_SUCCEED();
+}
 Result IAudioController::SetSpeakerAutoMuteEnabled(bool is_speaker_auto_mute_enabled) {
    LOG_INFO(Audio, "called, is_speaker_auto_mute_enabled={}", is_speaker_auto_mute_enabled);
diff --git a/src/core/hle/service/audio/audio_controller.h b/src/core/hle/service/audio/audio_controller.h
index 9e8514373..d37c4843e 100644
--- a/src/core/hle/service/audio/audio_controller.h
+++ b/src/core/hle/service/audio/audio_controller.h
@@ -45,6 +45,7 @@ private:
                                Set::AudioOutputMode output_mode);
    Result SetHeadphoneOutputLevelMode(HeadphoneOutputLevelMode output_level_mode);
    Result GetHeadphoneOutputLevelMode(Out<HeadphoneOutputLevelMode> out_output_level_mode);
+    Result NotifyHeadphoneVolumeWarningDisplayedEvent();
    Result SetSpeakerAutoMuteEnabled(bool is_speaker_auto_mute_enabled);
    Result IsSpeakerAutoMuteEnabled(Out<bool> out_is_speaker_auto_mute_enabled);
    Result AcquireTargetNotification(OutCopyHandle<Kernel::KReadableEvent> out_notification_event);
diff --git a/src/core/hle/service/audio/audio_device.cpp b/src/core/hle/service/audio/audio_device.cpp
new file mode 100644
index 000000000..438f3cccd
--- /dev/null
+++ b/src/core/hle/service/audio/audio_device.cpp
@@ -0,0 +1,163 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "audio_core/audio_core.h"
+#include "common/string_util.h"
+#include "core/hle/service/audio/audio_device.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::Renderer;
+IAudioDevice::IAudioDevice(Core::System& system_, u64 applet_resource_user_id, u32 revision,
+                           u32 device_num)
+    : ServiceFramework{system_, "IAudioDevice"}, service_context{system_, "IAudioDevice"},
+      impl{std::make_unique<AudioDevice>(system_, applet_resource_user_id, revision)},
+      event{service_context.CreateEvent(fmt::format("IAudioDeviceEvent-{}", device_num))} {
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioDevice::ListAudioDeviceName>, "ListAudioDeviceName"},
+        {1, D<&IAudioDevice::SetAudioDeviceOutputVolume>, "SetAudioDeviceOutputVolume"},
+        {2, D<&IAudioDevice::GetAudioDeviceOutputVolume>, "GetAudioDeviceOutputVolume"},
+        {3, D<&IAudioDevice::GetActiveAudioDeviceName>, "GetActiveAudioDeviceName"},
+        {4, D<&IAudioDevice::QueryAudioDeviceSystemEvent>, "QueryAudioDeviceSystemEvent"},
+        {5, D<&IAudioDevice::GetActiveChannelCount>, "GetActiveChannelCount"},
+        {6, D<&IAudioDevice::ListAudioDeviceNameAuto>, "ListAudioDeviceNameAuto"},
+        {7, D<&IAudioDevice::SetAudioDeviceOutputVolumeAuto>, "SetAudioDeviceOutputVolumeAuto"},
+        {8, D<&IAudioDevice::GetAudioDeviceOutputVolumeAuto>, "GetAudioDeviceOutputVolumeAuto"},
+        {10, D<&IAudioDevice::GetActiveAudioDeviceNameAuto>, "GetActiveAudioDeviceNameAuto"},
+        {11, D<&IAudioDevice::QueryAudioDeviceInputEvent>, "QueryAudioDeviceInputEvent"},
+        {12, D<&IAudioDevice::QueryAudioDeviceOutputEvent>, "QueryAudioDeviceOutputEvent"},
+        {13, D<&IAudioDevice::GetActiveAudioDeviceName>, "GetActiveAudioOutputDeviceName"},
+        {14, D<&IAudioDevice::ListAudioOutputDeviceName>, "ListAudioOutputDeviceName"},
+    };
+    RegisterHandlers(functions);
+    event->Signal();
+}
+IAudioDevice::~IAudioDevice() {
+    service_context.CloseEvent(event);
+}
+Result IAudioDevice::ListAudioDeviceName(
+    OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_names, Out<s32> out_count) {
+    R_RETURN(this->ListAudioDeviceNameAuto(out_names, out_count));
+}
+Result IAudioDevice::SetAudioDeviceOutputVolume(
+    InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> name, f32 volume) {
+    R_RETURN(this->SetAudioDeviceOutputVolumeAuto(name, volume));
+}
+Result IAudioDevice::GetAudioDeviceOutputVolume(
+    Out<f32> out_volume, InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> name) {
+    R_RETURN(this->GetAudioDeviceOutputVolumeAuto(out_volume, name));
+}
+Result IAudioDevice::GetActiveAudioDeviceName(
+    OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_name) {
+    R_RETURN(this->GetActiveAudioDeviceNameAuto(out_name));
+}
+Result IAudioDevice::ListAudioDeviceNameAuto(
+    OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> out_names,
+    Out<s32> out_count) {
+    *out_count = impl->ListAudioDeviceName(out_names);
+    std::string out{};
+    for (s32 i = 0; i < *out_count; i++) {
+        std::string a{};
+        u32 j = 0;
+        while (out_names[i].name[j] != '\0') {
+            a += out_names[i].name[j];
+            j++;
+        }
+        out += "\n\t" + a;
+    }
+    LOG_DEBUG(Service_Audio, "called.\nNames={}", out);
+    R_SUCCEED();
+}
+Result IAudioDevice::SetAudioDeviceOutputVolumeAuto(
+    InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> name, f32 volume) {
+    R_UNLESS(!name.empty(), Audio::ResultInsufficientBuffer);
+    const std::string device_name = Common::StringFromBuffer(name[0].name);
+    LOG_DEBUG(Service_Audio, "called. name={}, volume={}", device_name, volume);
+    if (device_name == "AudioTvOutput") {
+        impl->SetDeviceVolumes(volume);
+    }
+    R_SUCCEED();
+}
+Result IAudioDevice::GetAudioDeviceOutputVolumeAuto(
+    Out<f32> out_volume, InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> name) {
+    R_UNLESS(!name.empty(), Audio::ResultInsufficientBuffer);
+    const std::string device_name = Common::StringFromBuffer(name[0].name);
+    LOG_DEBUG(Service_Audio, "called. Name={}", device_name);
+    *out_volume = 1.0f;
+    if (device_name == "AudioTvOutput") {
+        *out_volume = impl->GetDeviceVolume(device_name);
+    }
+    R_SUCCEED();
+}
+Result IAudioDevice::GetActiveAudioDeviceNameAuto(
+    OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> out_name) {
+    R_UNLESS(!out_name.empty(), Audio::ResultInsufficientBuffer);
+    out_name[0] = AudioDevice::AudioDeviceName("AudioTvOutput");
+    LOG_DEBUG(Service_Audio, "(STUBBED) called");
+    R_SUCCEED();
+}
+Result IAudioDevice::QueryAudioDeviceSystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "(STUBBED) called");
+    event->Signal();
+    *out_event = &event->GetReadableEvent();
+    R_SUCCEED();
+}
+Result IAudioDevice::QueryAudioDeviceInputEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "(STUBBED) called");
+    *out_event = &event->GetReadableEvent();
+    R_SUCCEED();
+}
+Result IAudioDevice::QueryAudioDeviceOutputEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_event = &event->GetReadableEvent();
+    R_SUCCEED();
+}
+Result IAudioDevice::GetActiveChannelCount(Out<u32> out_active_channel_count) {
+    *out_active_channel_count = system.AudioCore().GetOutputSink().GetSystemChannels();
+    LOG_DEBUG(Service_Audio, "(STUBBED) called. Channels={}", *out_active_channel_count);
+    R_SUCCEED();
+}
+Result IAudioDevice::ListAudioOutputDeviceName(
+    OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_names, Out<s32> out_count) {
+    *out_count = impl->ListAudioOutputDeviceName(out_names);
+    std::string out{};
+    for (s32 i = 0; i < *out_count; i++) {
+        std::string a{};
+        u32 j = 0;
+        while (out_names[i].name[j] != '\0') {
+            a += out_names[i].name[j];
+            j++;
+        }
+        out += "\n\t" + a;
+    }
+    LOG_DEBUG(Service_Audio, "called.\nNames={}", out);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_device.h b/src/core/hle/service/audio/audio_device.h
new file mode 100644
index 000000000..752157272
--- /dev/null
+++ b/src/core/hle/service/audio/audio_device.h
@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/renderer/audio_device.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+namespace Kernel {
+class KReadableEvent;
+}
+namespace Service::Audio {
+using AudioCore::Renderer::AudioDevice;
+class IAudioDevice final : public ServiceFramework<IAudioDevice> {
+public:
+    explicit IAudioDevice(Core::System& system_, u64 applet_resource_user_id, u32 revision,
+                          u32 device_num);
+    ~IAudioDevice() override;
+private:
+    Result ListAudioDeviceName(
+        OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_names,
+        Out<s32> out_count);
+    Result SetAudioDeviceOutputVolume(
+        InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> name, f32 volume);
+    Result GetAudioDeviceOutputVolume(
+        Out<f32> out_volume, InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> name);
+    Result GetActiveAudioDeviceName(
+        OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_name);
+    Result ListAudioDeviceNameAuto(
+        OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> out_names,
+        Out<s32> out_count);
+    Result SetAudioDeviceOutputVolumeAuto(
+        InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> name, f32 volume);
+    Result GetAudioDeviceOutputVolumeAuto(
+        Out<f32> out_volume, InArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> name);
+    Result GetActiveAudioDeviceNameAuto(
+        OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcAutoSelect> out_name);
+    Result QueryAudioDeviceSystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result QueryAudioDeviceInputEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result QueryAudioDeviceOutputEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result GetActiveChannelCount(Out<u32> out_active_channel_count);
+    Result ListAudioOutputDeviceName(
+        OutArray<AudioDevice::AudioDeviceName, BufferAttr_HipcMapAlias> out_names,
+        Out<s32> out_count);
+    KernelHelpers::ServiceContext service_context;
+    std::unique_ptr<AudioCore::Renderer::AudioDevice> impl;
+    Kernel::KEvent* event;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_in.cpp b/src/core/hle/service/audio/audio_in.cpp
new file mode 100644
index 000000000..416803acc
--- /dev/null
+++ b/src/core/hle/service/audio/audio_in.cpp
@@ -0,0 +1,146 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/audio/audio_in.h"
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/ipc_helpers.h"
+namespace Service::Audio {
+using namespace AudioCore::AudioIn;
+IAudioIn::IAudioIn(Core::System& system_, Manager& manager, size_t session_id,
+                   const std::string& device_name, const AudioInParameter& in_params,
+                   Kernel::KProcess* handle, u64 applet_resource_user_id)
+    : ServiceFramework{system_, "IAudioIn"}, process{handle}, service_context{system_, "IAudioIn"},
+      event{service_context.CreateEvent("AudioInEvent")}, impl{std::make_shared<In>(system_,
+                                                                                    manager, event,
+                                                                                    session_id)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioIn::GetAudioInState>, "GetAudioInState"},
+        {1, D<&IAudioIn::Start>, "Start"},
+        {2, D<&IAudioIn::Stop>, "Stop"},
+        {3, D<&IAudioIn::AppendAudioInBuffer>, "AppendAudioInBuffer"},
+        {4, D<&IAudioIn::RegisterBufferEvent>, "RegisterBufferEvent"},
+        {5, D<&IAudioIn::GetReleasedAudioInBuffers>, "GetReleasedAudioInBuffers"},
+        {6, D<&IAudioIn::ContainsAudioInBuffer>, "ContainsAudioInBuffer"},
+        {7, D<&IAudioIn::AppendAudioInBuffer>, "AppendUacInBuffer"},
+        {8, D<&IAudioIn::AppendAudioInBufferAuto>, "AppendAudioInBufferAuto"},
+        {9, D<&IAudioIn::GetReleasedAudioInBuffersAuto>, "GetReleasedAudioInBuffersAuto"},
+        {10, D<&IAudioIn::AppendAudioInBufferAuto>, "AppendUacInBufferAuto"},
+        {11, D<&IAudioIn::GetAudioInBufferCount>, "GetAudioInBufferCount"},
+        {12, D<&IAudioIn::SetDeviceGain>, "SetDeviceGain"},
+        {13, D<&IAudioIn::GetDeviceGain>, "GetDeviceGain"},
+        {14, D<&IAudioIn::FlushAudioInBuffers>, "FlushAudioInBuffers"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+    process->Open();
+    if (impl->GetSystem()
+            .Initialize(device_name, in_params, handle, applet_resource_user_id)
+            .IsError()) {
+        LOG_ERROR(Service_Audio, "Failed to initialize the AudioIn System!");
+    }
+}
+IAudioIn::~IAudioIn() {
+    impl->Free();
+    service_context.CloseEvent(event);
+    process->Close();
+}
+Result IAudioIn::GetAudioInState(Out<u32> out_state) {
+    *out_state = static_cast<u32>(impl->GetState());
+    LOG_DEBUG(Service_Audio, "called. state={}", *out_state);
+    R_SUCCEED();
+}
+Result IAudioIn::Start() {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->StartSystem());
+}
+Result IAudioIn::Stop() {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->StopSystem());
+}
+Result IAudioIn::AppendAudioInBuffer(InArray<AudioInBuffer, BufferAttr_HipcMapAlias> buffer,
+                                     u64 buffer_client_ptr) {
+    R_RETURN(this->AppendAudioInBufferAuto(buffer, buffer_client_ptr));
+}
+Result IAudioIn::AppendAudioInBufferAuto(InArray<AudioInBuffer, BufferAttr_HipcAutoSelect> buffer,
+                                         u64 buffer_client_ptr) {
+    if (buffer.empty()) {
+        LOG_ERROR(Service_Audio, "Input buffer is too small for an AudioInBuffer!");
+        R_THROW(Audio::ResultInsufficientBuffer);
+    }
+    [[maybe_unused]] const auto session_id{impl->GetSystem().GetSessionId()};
+    LOG_TRACE(Service_Audio, "called. Session {} Appending buffer {:08X}", session_id,
+              buffer_client_ptr);
+    R_RETURN(impl->AppendBuffer(buffer[0], buffer_client_ptr));
+}
+Result IAudioIn::RegisterBufferEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_event = &impl->GetBufferEvent();
+    R_SUCCEED();
+}
+Result IAudioIn::GetReleasedAudioInBuffers(OutArray<u64, BufferAttr_HipcMapAlias> out_audio_buffer,
+                                           Out<u32> out_count) {
+    R_RETURN(this->GetReleasedAudioInBuffersAuto(out_audio_buffer, out_count));
+}
+Result IAudioIn::GetReleasedAudioInBuffersAuto(
+    OutArray<u64, BufferAttr_HipcAutoSelect> out_audio_buffer, Out<u32> out_count) {
+    if (!out_audio_buffer.empty()) {
+        out_audio_buffer[0] = 0;
+    }
+    *out_count = impl->GetReleasedBuffers(out_audio_buffer);
+    LOG_TRACE(Service_Audio, "called. Session {} released {} buffers",
+              impl->GetSystem().GetSessionId(), *out_count);
+    R_SUCCEED();
+}
+Result IAudioIn::ContainsAudioInBuffer(Out<bool> out_contains_buffer, u64 buffer_client_ptr) {
+    *out_contains_buffer = impl->ContainsAudioBuffer(buffer_client_ptr);
+    LOG_DEBUG(Service_Audio, "called. Is buffer {:08X} registered? {}", buffer_client_ptr,
+              *out_contains_buffer);
+    R_SUCCEED();
+}
+Result IAudioIn::GetAudioInBufferCount(Out<u32> out_buffer_count) {
+    *out_buffer_count = impl->GetBufferCount();
+    LOG_DEBUG(Service_Audio, "called. Buffer count={}", *out_buffer_count);
+    R_SUCCEED();
+}
+Result IAudioIn::SetDeviceGain(f32 device_gain) {
+    impl->SetVolume(device_gain);
+    LOG_DEBUG(Service_Audio, "called. Gain {}", device_gain);
+    R_SUCCEED();
+}
+Result IAudioIn::GetDeviceGain(Out<f32> out_device_gain) {
+    *out_device_gain = impl->GetVolume();
+    LOG_DEBUG(Service_Audio, "called. Gain {}", *out_device_gain);
+    R_SUCCEED();
+}
+Result IAudioIn::FlushAudioInBuffers(Out<bool> out_flushed) {
+    *out_flushed = impl->FlushAudioInBuffers();
+    LOG_DEBUG(Service_Audio, "called. Were any buffers flushed? {}", *out_flushed);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_in.h b/src/core/hle/service/audio/audio_in.h
new file mode 100644
index 000000000..3fe1e1e87
--- /dev/null
+++ b/src/core/hle/service/audio/audio_in.h
@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/in/audio_in.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+class IAudioIn final : public ServiceFramework<IAudioIn> {
+public:
+    explicit IAudioIn(Core::System& system_, AudioCore::AudioIn::Manager& manager,
+                      size_t session_id, const std::string& device_name,
+                      const AudioCore::AudioIn::AudioInParameter& in_params,
+                      Kernel::KProcess* handle, u64 applet_resource_user_id);
+    ~IAudioIn() override;
+    std::shared_ptr<AudioCore::AudioIn::In> GetImpl() {
+        return impl;
+    }
+    Result GetAudioInState(Out<u32> out_state);
+    Result Start();
+    Result Stop();
+    Result AppendAudioInBuffer(
+        InArray<AudioCore::AudioIn::AudioInBuffer, BufferAttr_HipcMapAlias> buffer,
+        u64 buffer_client_ptr);
+    Result AppendAudioInBufferAuto(
+        InArray<AudioCore::AudioIn::AudioInBuffer, BufferAttr_HipcAutoSelect> buffer,
+        u64 buffer_client_ptr);
+    Result RegisterBufferEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result GetReleasedAudioInBuffers(OutArray<u64, BufferAttr_HipcMapAlias> out_audio_buffer,
+                                     Out<u32> out_count);
+    Result GetReleasedAudioInBuffersAuto(OutArray<u64, BufferAttr_HipcAutoSelect> out_audio_buffer,
+                                         Out<u32> out_count);
+    Result ContainsAudioInBuffer(Out<bool> out_contains_buffer, u64 buffer_client_ptr);
+    Result GetAudioInBufferCount(Out<u32> out_buffer_count);
+    Result SetDeviceGain(f32 device_gain);
+    Result GetDeviceGain(Out<f32> out_device_gain);
+    Result FlushAudioInBuffers(Out<bool> out_flushed);
+private:
+    Kernel::KProcess* process;
+    KernelHelpers::ServiceContext service_context;
+    Kernel::KEvent* event;
+    std::shared_ptr<AudioCore::AudioIn::In> impl;
+    Common::ScratchBuffer<u64> released_buffer;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_in_manager.cpp b/src/core/hle/service/audio/audio_in_manager.cpp
new file mode 100644
index 000000000..2675a5773
--- /dev/null
+++ b/src/core/hle/service/audio/audio_in_manager.cpp
@@ -0,0 +1,125 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "common/string_util.h"
+#include "core/hle/service/audio/audio_in.h"
+#include "core/hle/service/audio/audio_in_manager.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::AudioIn;
+IAudioInManager::IAudioInManager(Core::System& system_)
+    : ServiceFramework{system_, "audin:u"}, impl{std::make_unique<AudioCore::AudioIn::Manager>(
+                                                system_)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioInManager::ListAudioIns>, "ListAudioIns"},
+        {1, D<&IAudioInManager::OpenAudioIn>, "OpenAudioIn"},
+        {2, D<&IAudioInManager::ListAudioIns>, "ListAudioInsAuto"},
+        {3, D<&IAudioInManager::OpenAudioIn>, "OpenAudioInAuto"},
+        {4, D<&IAudioInManager::ListAudioInsAutoFiltered>, "ListAudioInsAutoFiltered"},
+        {5, D<&IAudioInManager::OpenAudioInProtocolSpecified>, "OpenAudioInProtocolSpecified"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IAudioInManager::~IAudioInManager() = default;
+Result IAudioInManager::ListAudioIns(
+    OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_audio_ins, Out<u32> out_count) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(this->ListAudioInsAutoFiltered(out_audio_ins, out_count));
+}
+Result IAudioInManager::OpenAudioIn(Out<AudioInParameterInternal> out_parameter_internal,
+                                    Out<SharedPointer<IAudioIn>> out_audio_in,
+                                    OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_name,
+                                    InArray<AudioDeviceName, BufferAttr_HipcMapAlias> name,
+                                    AudioInParameter parameter,
+                                    InCopyHandle<Kernel::KProcess> process_handle,
+                                    ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(this->OpenAudioInProtocolSpecified(out_parameter_internal, out_audio_in, out_name,
+                                                name, {}, parameter, process_handle, aruid));
+}
+Result IAudioInManager::ListAudioInsAuto(
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_ins, Out<u32> out_count) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(this->ListAudioInsAutoFiltered(out_audio_ins, out_count));
+}
+Result IAudioInManager::OpenAudioInAuto(
+    Out<AudioInParameterInternal> out_parameter_internal, Out<SharedPointer<IAudioIn>> out_audio_in,
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+    InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name, AudioInParameter parameter,
+    InCopyHandle<Kernel::KProcess> process_handle, ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(this->OpenAudioInProtocolSpecified(out_parameter_internal, out_audio_in, out_name,
+                                                name, {}, parameter, process_handle, aruid));
+}
+Result IAudioInManager::ListAudioInsAutoFiltered(
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_ins, Out<u32> out_count) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_count = impl->GetDeviceNames(out_audio_ins, true);
+    R_SUCCEED();
+}
+Result IAudioInManager::OpenAudioInProtocolSpecified(
+    Out<AudioInParameterInternal> out_parameter_internal, Out<SharedPointer<IAudioIn>> out_audio_in,
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+    InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name, Protocol protocol,
+    AudioInParameter parameter, InCopyHandle<Kernel::KProcess> process_handle,
+    ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called");
+    if (!process_handle) {
+        LOG_ERROR(Service_Audio, "Failed to get process handle");
+        R_THROW(ResultUnknown);
+    }
+    if (name.empty() || out_name.empty()) {
+        LOG_ERROR(Service_Audio, "Invalid buffers");
+        R_THROW(ResultUnknown);
+    }
+    std::scoped_lock l{impl->mutex};
+    size_t new_session_id{};
+    R_TRY(impl->LinkToManager());
+    R_TRY(impl->AcquireSessionId(new_session_id));
+    LOG_DEBUG(Service_Audio, "Opening new AudioIn, session_id={}, free sessions={}", new_session_id,
+              impl->num_free_sessions);
+    const auto device_name = Common::StringFromBuffer(name[0].name);
+    *out_audio_in = std::make_shared<IAudioIn>(system, *impl, new_session_id, device_name,
+                                               parameter, process_handle.Get(), aruid.pid);
+    impl->sessions[new_session_id] = (*out_audio_in)->GetImpl();
+    impl->applet_resource_user_ids[new_session_id] = aruid.pid;
+    auto& out_system = impl->sessions[new_session_id]->GetSystem();
+    *out_parameter_internal =
+        AudioInParameterInternal{.sample_rate = out_system.GetSampleRate(),
+                                 .channel_count = out_system.GetChannelCount(),
+                                 .sample_format = static_cast<u32>(out_system.GetSampleFormat()),
+                                 .state = static_cast<u32>(out_system.GetState())};
+    out_name[0] = AudioDeviceName(out_system.GetName());
+    if (protocol == Protocol{}) {
+        if (out_system.IsUac()) {
+            out_name[0] = AudioDeviceName("UacIn");
+        } else {
+            out_name[0] = AudioDeviceName("DeviceIn");
+        }
+    }
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_in_manager.h b/src/core/hle/service/audio/audio_in_manager.h
new file mode 100644
index 000000000..2a983bc60
--- /dev/null
+++ b/src/core/hle/service/audio/audio_in_manager.h
@@ -0,0 +1,57 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/audio_in_manager.h"
+#include "audio_core/in/audio_in_system.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+using AudioDeviceName = AudioCore::Renderer::AudioDevice::AudioDeviceName;
+using Protocol = std::array<u32, 2>;
+class IAudioIn;
+class IAudioInManager final : public ServiceFramework<IAudioInManager> {
+public:
+    explicit IAudioInManager(Core::System& system_);
+    ~IAudioInManager() override;
+private:
+    Result ListAudioIns(OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_audio_ins,
+                        Out<u32> out_count);
+    Result OpenAudioIn(Out<AudioCore::AudioIn::AudioInParameterInternal> out_parameter_internal,
+                       Out<SharedPointer<IAudioIn>> out_audio_in,
+                       OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_name,
+                       InArray<AudioDeviceName, BufferAttr_HipcMapAlias> name,
+                       AudioCore::AudioIn::AudioInParameter parameter,
+                       InCopyHandle<Kernel::KProcess> process_handle,
+                       ClientAppletResourceUserId aruid);
+    Result ListAudioInsAuto(OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_ins,
+                            Out<u32> out_count);
+    Result OpenAudioInAuto(Out<AudioCore::AudioIn::AudioInParameterInternal> out_parameter_internal,
+                           Out<SharedPointer<IAudioIn>> out_audio_in,
+                           OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+                           InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name,
+                           AudioCore::AudioIn::AudioInParameter parameter,
+                           InCopyHandle<Kernel::KProcess> process_handle,
+                           ClientAppletResourceUserId aruid);
+    Result ListAudioInsAutoFiltered(
+        OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_ins, Out<u32> out_count);
+    Result OpenAudioInProtocolSpecified(
+        Out<AudioCore::AudioIn::AudioInParameterInternal> out_parameter_internal,
+        Out<SharedPointer<IAudioIn>> out_audio_in,
+        OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+        InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name, Protocol protocol,
+        AudioCore::AudioIn::AudioInParameter parameter,
+        InCopyHandle<Kernel::KProcess> process_handle, ClientAppletResourceUserId aruid);
+    std::unique_ptr<AudioCore::AudioIn::Manager> impl;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_out.cpp b/src/core/hle/service/audio/audio_out.cpp
new file mode 100644
index 000000000..53009d5d7
--- /dev/null
+++ b/src/core/hle/service/audio/audio_out.cpp
@@ -0,0 +1,146 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "audio_core/out/audio_out.h"
+#include "audio_core/out/audio_out_system.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/service/audio/audio_out.h"
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+using namespace AudioCore::AudioOut;
+IAudioOut::IAudioOut(Core::System& system_, Manager& manager, size_t session_id,
+                     const std::string& device_name, const AudioOutParameter& in_params,
+                     Kernel::KProcess* handle, u64 applet_resource_user_id)
+    : ServiceFramework{system_, "IAudioOut"}, service_context{system_, "IAudioOut"},
+      event{service_context.CreateEvent("AudioOutEvent")}, process{handle},
+      impl{std::make_shared<AudioCore::AudioOut::Out>(system_, manager, event, session_id)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioOut::GetAudioOutState>, "GetAudioOutState"},
+        {1, D<&IAudioOut::Start>, "Start"},
+        {2, D<&IAudioOut::Stop>, "Stop"},
+        {3, D<&IAudioOut::AppendAudioOutBuffer>, "AppendAudioOutBuffer"},
+        {4, D<&IAudioOut::RegisterBufferEvent>, "RegisterBufferEvent"},
+        {5, D<&IAudioOut::GetReleasedAudioOutBuffers>, "GetReleasedAudioOutBuffers"},
+        {6, D<&IAudioOut::ContainsAudioOutBuffer>, "ContainsAudioOutBuffer"},
+        {7, D<&IAudioOut::AppendAudioOutBufferAuto>, "AppendAudioOutBufferAuto"},
+        {8, D<&IAudioOut::GetReleasedAudioOutBuffersAuto>, "GetReleasedAudioOutBuffersAuto"},
+        {9, D<&IAudioOut::GetAudioOutBufferCount>, "GetAudioOutBufferCount"},
+        {10, D<&IAudioOut::GetAudioOutPlayedSampleCount>, "GetAudioOutPlayedSampleCount"},
+        {11, D<&IAudioOut::FlushAudioOutBuffers>, "FlushAudioOutBuffers"},
+        {12, D<&IAudioOut::SetAudioOutVolume>, "SetAudioOutVolume"},
+        {13, D<&IAudioOut::GetAudioOutVolume>, "GetAudioOutVolume"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+    process->Open();
+}
+IAudioOut::~IAudioOut() {
+    impl->Free();
+    service_context.CloseEvent(event);
+    process->Close();
+}
+Result IAudioOut::GetAudioOutState(Out<u32> out_state) {
+    *out_state = static_cast<u32>(impl->GetState());
+    LOG_DEBUG(Service_Audio, "called. state={}", *out_state);
+    R_SUCCEED();
+}
+Result IAudioOut::Start() {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->StartSystem());
+}
+Result IAudioOut::Stop() {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->StopSystem());
+}
+Result IAudioOut::AppendAudioOutBuffer(
+    InArray<AudioOutBuffer, BufferAttr_HipcMapAlias> audio_out_buffer, u64 buffer_client_ptr) {
+    R_RETURN(this->AppendAudioOutBufferAuto(audio_out_buffer, buffer_client_ptr));
+}
+Result IAudioOut::AppendAudioOutBufferAuto(
+    InArray<AudioOutBuffer, BufferAttr_HipcAutoSelect> audio_out_buffer, u64 buffer_client_ptr) {
+    if (audio_out_buffer.empty()) {
+        LOG_ERROR(Service_Audio, "Input buffer is too small for an AudioOutBuffer!");
+        R_THROW(Audio::ResultInsufficientBuffer);
+    }
+    LOG_TRACE(Service_Audio, "called. Session {} Appending buffer {:08X}",
+              impl->GetSystem().GetSessionId(), buffer_client_ptr);
+    R_RETURN(impl->AppendBuffer(audio_out_buffer[0], buffer_client_ptr));
+}
+Result IAudioOut::RegisterBufferEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_event = &impl->GetBufferEvent();
+    R_SUCCEED();
+}
+Result IAudioOut::GetReleasedAudioOutBuffers(
+    OutArray<u64, BufferAttr_HipcMapAlias> out_audio_buffer, Out<u32> out_count) {
+    R_RETURN(this->GetReleasedAudioOutBuffersAuto(out_audio_buffer, out_count));
+}
+Result IAudioOut::GetReleasedAudioOutBuffersAuto(
+    OutArray<u64, BufferAttr_HipcAutoSelect> out_audio_buffer, Out<u32> out_count) {
+    if (!out_audio_buffer.empty()) {
+        out_audio_buffer[0] = 0;
+    }
+    *out_count = impl->GetReleasedBuffers(out_audio_buffer);
+    LOG_TRACE(Service_Audio, "called. Session {} released {} buffers",
+              impl->GetSystem().GetSessionId(), *out_count);
+    R_SUCCEED();
+}
+Result IAudioOut::ContainsAudioOutBuffer(Out<bool> out_contains_buffer, u64 buffer_client_ptr) {
+    *out_contains_buffer = impl->ContainsAudioBuffer(buffer_client_ptr);
+    LOG_DEBUG(Service_Audio, "called. Is buffer {:08X} registered? {}", buffer_client_ptr,
+              *out_contains_buffer);
+    R_SUCCEED();
+}
+Result IAudioOut::GetAudioOutBufferCount(Out<u32> out_buffer_count) {
+    *out_buffer_count = impl->GetBufferCount();
+    LOG_DEBUG(Service_Audio, "called. Buffer count={}", *out_buffer_count);
+    R_SUCCEED();
+}
+Result IAudioOut::GetAudioOutPlayedSampleCount(Out<u64> out_played_sample_count) {
+    *out_played_sample_count = impl->GetPlayedSampleCount();
+    LOG_DEBUG(Service_Audio, "called. Played samples={}", *out_played_sample_count);
+    R_SUCCEED();
+}
+Result IAudioOut::FlushAudioOutBuffers(Out<bool> out_flushed) {
+    *out_flushed = impl->FlushAudioOutBuffers();
+    LOG_DEBUG(Service_Audio, "called. Were any buffers flushed? {}", *out_flushed);
+    R_SUCCEED();
+}
+Result IAudioOut::SetAudioOutVolume(f32 volume) {
+    LOG_DEBUG(Service_Audio, "called. Volume={}", volume);
+    impl->SetVolume(volume);
+    R_SUCCEED();
+}
+Result IAudioOut::GetAudioOutVolume(Out<f32> out_volume) {
+    *out_volume = impl->GetVolume();
+    LOG_DEBUG(Service_Audio, "called. Volume={}", *out_volume);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_out.h b/src/core/hle/service/audio/audio_out.h
new file mode 100644
index 000000000..779b213e7
--- /dev/null
+++ b/src/core/hle/service/audio/audio_out.h
@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/audio_out_manager.h"
+#include "audio_core/out/audio_out_system.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+namespace Kernel {
+class KReadableEvent;
+}
+namespace Service::Audio {
+class IAudioOut : public ServiceFramework<IAudioOut> {
+public:
+    explicit IAudioOut(Core::System& system_, AudioCore::AudioOut::Manager& manager,
+                       size_t session_id, const std::string& device_name,
+                       const AudioCore::AudioOut::AudioOutParameter& in_params,
+                       Kernel::KProcess* handle, u64 applet_resource_user_id);
+    ~IAudioOut() override;
+    std::shared_ptr<AudioCore::AudioOut::Out> GetImpl() {
+        return impl;
+    }
+    Result GetAudioOutState(Out<u32> out_state);
+    Result Start();
+    Result Stop();
+    Result AppendAudioOutBuffer(
+        InArray<AudioCore::AudioOut::AudioOutBuffer, BufferAttr_HipcMapAlias> audio_out_buffer,
+        u64 buffer_client_ptr);
+    Result AppendAudioOutBufferAuto(
+        InArray<AudioCore::AudioOut::AudioOutBuffer, BufferAttr_HipcAutoSelect> audio_out_buffer,
+        u64 buffer_client_ptr);
+    Result RegisterBufferEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result GetReleasedAudioOutBuffers(OutArray<u64, BufferAttr_HipcMapAlias> out_audio_buffer,
+                                      Out<u32> out_count);
+    Result GetReleasedAudioOutBuffersAuto(OutArray<u64, BufferAttr_HipcAutoSelect> out_audio_buffer,
+                                          Out<u32> out_count);
+    Result ContainsAudioOutBuffer(Out<bool> out_contains_buffer, u64 buffer_client_ptr);
+    Result GetAudioOutBufferCount(Out<u32> out_buffer_count);
+    Result GetAudioOutPlayedSampleCount(Out<u64> out_played_sample_count);
+    Result FlushAudioOutBuffers(Out<bool> out_flushed);
+    Result SetAudioOutVolume(f32 volume);
+    Result GetAudioOutVolume(Out<f32> out_volume);
+private:
+    KernelHelpers::ServiceContext service_context;
+    Kernel::KEvent* event;
+    Kernel::KProcess* process;
+    std::shared_ptr<AudioCore::AudioOut::Out> impl;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_out_manager.cpp b/src/core/hle/service/audio/audio_out_manager.cpp
new file mode 100644
index 000000000..153445097
--- /dev/null
+++ b/src/core/hle/service/audio/audio_out_manager.cpp
@@ -0,0 +1,101 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "common/string_util.h"
+#include "core/hle/service/audio/audio_out.h"
+#include "core/hle/service/audio/audio_out_manager.h"
+#include "core/hle/service/cmif_serialization.h"
+#include "core/memory.h"
+namespace Service::Audio {
+using namespace AudioCore::AudioOut;
+IAudioOutManager::IAudioOutManager(Core::System& system_)
+    : ServiceFramework{system_, "audout:u"}, impl{std::make_unique<Manager>(system_)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioOutManager::ListAudioOuts>, "ListAudioOuts"},
+        {1, D<&IAudioOutManager::OpenAudioOut>, "OpenAudioOut"},
+        {2, D<&IAudioOutManager::ListAudioOutsAuto>, "ListAudioOutsAuto"},
+        {3, D<&IAudioOutManager::OpenAudioOutAuto>, "OpenAudioOutAuto"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IAudioOutManager::~IAudioOutManager() = default;
+Result IAudioOutManager::ListAudioOuts(
+    OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_audio_outs, Out<u32> out_count) {
+    R_RETURN(this->ListAudioOutsAuto(out_audio_outs, out_count));
+}
+Result IAudioOutManager::OpenAudioOut(Out<AudioOutParameterInternal> out_parameter_internal,
+                                      Out<SharedPointer<IAudioOut>> out_audio_out,
+                                      OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_name,
+                                      InArray<AudioDeviceName, BufferAttr_HipcMapAlias> name,
+                                      AudioOutParameter parameter,
+                                      InCopyHandle<Kernel::KProcess> process_handle,
+                                      ClientAppletResourceUserId aruid) {
+    R_RETURN(this->OpenAudioOutAuto(out_parameter_internal, out_audio_out, out_name, name,
+                                    parameter, process_handle, aruid));
+}
+Result IAudioOutManager::ListAudioOutsAuto(
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_outs, Out<u32> out_count) {
+    if (!out_audio_outs.empty()) {
+        out_audio_outs[0] = AudioDeviceName("DeviceOut");
+        *out_count = 1;
+        LOG_DEBUG(Service_Audio, "called. \nName=DeviceOut");
+    } else {
+        *out_count = 0;
+        LOG_DEBUG(Service_Audio, "called. Empty buffer passed in.");
+    }
+    R_SUCCEED();
+}
+Result IAudioOutManager::OpenAudioOutAuto(
+    Out<AudioOutParameterInternal> out_parameter_internal,
+    Out<SharedPointer<IAudioOut>> out_audio_out,
+    OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+    InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name, AudioOutParameter parameter,
+    InCopyHandle<Kernel::KProcess> process_handle, ClientAppletResourceUserId aruid) {
+    if (!process_handle) {
+        LOG_ERROR(Service_Audio, "Failed to get process handle");
+        R_THROW(ResultUnknown);
+    }
+    if (name.empty() || out_name.empty()) {
+        LOG_ERROR(Service_Audio, "Invalid buffers");
+        R_THROW(ResultUnknown);
+    }
+    size_t new_session_id{};
+    R_TRY(impl->LinkToManager());
+    R_TRY(impl->AcquireSessionId(new_session_id));
+    const auto device_name = Common::StringFromBuffer(name[0].name);
+    LOG_DEBUG(Service_Audio, "Opening new AudioOut, sessionid={}, free sessions={}", new_session_id,
+              impl->num_free_sessions);
+    auto audio_out = std::make_shared<IAudioOut>(system, *impl, new_session_id, device_name,
+                                                 parameter, process_handle.Get(), aruid.pid);
+    R_TRY(audio_out->GetImpl()->GetSystem().Initialize(device_name, parameter, process_handle.Get(),
+                                                       aruid.pid));
+    *out_audio_out = audio_out;
+    impl->sessions[new_session_id] = audio_out->GetImpl();
+    impl->applet_resource_user_ids[new_session_id] = aruid.pid;
+    auto& out_system = impl->sessions[new_session_id]->GetSystem();
+    *out_parameter_internal =
+        AudioOutParameterInternal{.sample_rate = out_system.GetSampleRate(),
+                                  .channel_count = out_system.GetChannelCount(),
+                                  .sample_format = static_cast<u32>(out_system.GetSampleFormat()),
+                                  .state = static_cast<u32>(out_system.GetState())};
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_out_manager.h b/src/core/hle/service/audio/audio_out_manager.h
new file mode 100644
index 000000000..eaa27bc79
--- /dev/null
+++ b/src/core/hle/service/audio/audio_out_manager.h
@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/audio_out_manager.h"
+#include "audio_core/out/audio_out.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+using AudioDeviceName = AudioCore::Renderer::AudioDevice::AudioDeviceName;
+class IAudioOut;
+class IAudioOutManager final : public ServiceFramework<IAudioOutManager> {
+public:
+    explicit IAudioOutManager(Core::System& system_);
+    ~IAudioOutManager() override;
+private:
+    Result ListAudioOuts(OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_audio_outs,
+                         Out<u32> out_count);
+    Result OpenAudioOut(Out<AudioCore::AudioOut::AudioOutParameterInternal> out_parameter_internal,
+                        Out<SharedPointer<IAudioOut>> out_audio_out,
+                        OutArray<AudioDeviceName, BufferAttr_HipcMapAlias> out_name,
+                        InArray<AudioDeviceName, BufferAttr_HipcMapAlias> name,
+                        AudioCore::AudioOut::AudioOutParameter parameter,
+                        InCopyHandle<Kernel::KProcess> process_handle,
+                        ClientAppletResourceUserId aruid);
+    Result ListAudioOutsAuto(OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_audio_outs,
+                             Out<u32> out_count);
+    Result OpenAudioOutAuto(
+        Out<AudioCore::AudioOut::AudioOutParameterInternal> out_parameter_internal,
+        Out<SharedPointer<IAudioOut>> out_audio_out,
+        OutArray<AudioDeviceName, BufferAttr_HipcAutoSelect> out_name,
+        InArray<AudioDeviceName, BufferAttr_HipcAutoSelect> name,
+        AudioCore::AudioOut::AudioOutParameter parameter,
+        InCopyHandle<Kernel::KProcess> process_handle, ClientAppletResourceUserId aruid);
+    std::unique_ptr<AudioCore::AudioOut::Manager> impl;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_renderer.cpp b/src/core/hle/service/audio/audio_renderer.cpp
new file mode 100644
index 000000000..fc4aad233
--- /dev/null
+++ b/src/core/hle/service/audio/audio_renderer.cpp
@@ -0,0 +1,139 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/audio/audio_renderer.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::Renderer;
+IAudioRenderer::IAudioRenderer(Core::System& system_, Manager& manager_,
+                               AudioCore::AudioRendererParameterInternal& params,
+                               Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
+                               Kernel::KProcess* process_handle_, u64 applet_resource_user_id,
+                               s32 session_id)
+    : ServiceFramework{system_, "IAudioRenderer"}, service_context{system_, "IAudioRenderer"},
+      rendered_event{service_context.CreateEvent("IAudioRendererEvent")}, manager{manager_},
+      impl{std::make_unique<Renderer>(system_, manager, rendered_event)}, process_handle{
+                                                                              process_handle_} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioRenderer::GetSampleRate>, "GetSampleRate"},
+        {1, D<&IAudioRenderer::GetSampleCount>, "GetSampleCount"},
+        {2, D<&IAudioRenderer::GetMixBufferCount>, "GetMixBufferCount"},
+        {3, D<&IAudioRenderer::GetState>, "GetState"},
+        {4, D<&IAudioRenderer::RequestUpdate>, "RequestUpdate"},
+        {5, D<&IAudioRenderer::Start>, "Start"},
+        {6, D<&IAudioRenderer::Stop>, "Stop"},
+        {7, D<&IAudioRenderer::QuerySystemEvent>, "QuerySystemEvent"},
+        {8, D<&IAudioRenderer::SetRenderingTimeLimit>, "SetRenderingTimeLimit"},
+        {9, D<&IAudioRenderer::GetRenderingTimeLimit>, "GetRenderingTimeLimit"},
+        {10, D<&IAudioRenderer::RequestUpdateAuto>, "RequestUpdateAuto"},
+        {11, nullptr, "ExecuteAudioRendererRendering"},
+        {12, D<&IAudioRenderer::SetVoiceDropParameter>, "SetVoiceDropParameter"},
+        {13, D<&IAudioRenderer::GetVoiceDropParameter>, "GetVoiceDropParameter"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+    process_handle->Open();
+    impl->Initialize(params, transfer_memory, transfer_memory_size, process_handle,
+                     applet_resource_user_id, session_id);
+}
+IAudioRenderer::~IAudioRenderer() {
+    impl->Finalize();
+    service_context.CloseEvent(rendered_event);
+    process_handle->Close();
+}
+Result IAudioRenderer::GetSampleRate(Out<u32> out_sample_rate) {
+    *out_sample_rate = impl->GetSystem().GetSampleRate();
+    LOG_DEBUG(Service_Audio, "called. Sample rate {}", *out_sample_rate);
+    R_SUCCEED();
+}
+Result IAudioRenderer::GetSampleCount(Out<u32> out_sample_count) {
+    *out_sample_count = impl->GetSystem().GetSampleCount();
+    LOG_DEBUG(Service_Audio, "called. Sample count {}", *out_sample_count);
+    R_SUCCEED();
+}
+Result IAudioRenderer::GetState(Out<u32> out_state) {
+    *out_state = !impl->GetSystem().IsActive();
+    LOG_DEBUG(Service_Audio, "called, state {}", *out_state);
+    R_SUCCEED();
+}
+Result IAudioRenderer::GetMixBufferCount(Out<u32> out_mix_buffer_count) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_mix_buffer_count = impl->GetSystem().GetMixBufferCount();
+    R_SUCCEED();
+}
+Result IAudioRenderer::RequestUpdate(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+                                     OutBuffer<BufferAttr_HipcMapAlias> out_performance_buffer,
+                                     InBuffer<BufferAttr_HipcMapAlias> input) {
+    R_RETURN(this->RequestUpdateAuto(out_buffer, out_performance_buffer, input));
+}
+Result IAudioRenderer::RequestUpdateAuto(
+    OutBuffer<BufferAttr_HipcAutoSelect> out_buffer,
+    OutBuffer<BufferAttr_HipcAutoSelect> out_performance_buffer,
+    InBuffer<BufferAttr_HipcAutoSelect> input) {
+    LOG_TRACE(Service_Audio, "called");
+    const auto result = impl->RequestUpdate(input, out_performance_buffer, out_buffer);
+    if (result.IsFailure()) {
+        LOG_ERROR(Service_Audio, "RequestUpdate failed error 0x{:02X}!", result.GetDescription());
+    }
+    R_RETURN(result);
+}
+Result IAudioRenderer::Start() {
+    LOG_DEBUG(Service_Audio, "called");
+    impl->Start();
+    R_SUCCEED();
+}
+Result IAudioRenderer::Stop() {
+    LOG_DEBUG(Service_Audio, "called");
+    impl->Stop();
+    R_SUCCEED();
+}
+Result IAudioRenderer::QuerySystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_UNLESS(impl->GetSystem().GetExecutionMode() != AudioCore::ExecutionMode::Manual,
+             Audio::ResultNotSupported);
+    *out_event = &rendered_event->GetReadableEvent();
+    R_SUCCEED();
+}
+Result IAudioRenderer::SetRenderingTimeLimit(u32 rendering_time_limit) {
+    LOG_DEBUG(Service_Audio, "called");
+    impl->GetSystem().SetRenderingTimeLimit(rendering_time_limit);
+    ;
+    R_SUCCEED();
+}
+Result IAudioRenderer::GetRenderingTimeLimit(Out<u32> out_rendering_time_limit) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_rendering_time_limit = impl->GetSystem().GetRenderingTimeLimit();
+    R_SUCCEED();
+}
+Result IAudioRenderer::SetVoiceDropParameter(f32 voice_drop_parameter) {
+    LOG_DEBUG(Service_Audio, "called");
+    impl->GetSystem().SetVoiceDropParameter(voice_drop_parameter);
+    R_SUCCEED();
+}
+Result IAudioRenderer::GetVoiceDropParameter(Out<f32> out_voice_drop_parameter) {
+    LOG_DEBUG(Service_Audio, "called");
+    *out_voice_drop_parameter = impl->GetSystem().GetVoiceDropParameter();
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_renderer.h b/src/core/hle/service/audio/audio_renderer.h
new file mode 100644
index 000000000..f25c50ce8
--- /dev/null
+++ b/src/core/hle/service/audio/audio_renderer.h
@@ -0,0 +1,54 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/renderer/audio_renderer.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+namespace Kernel {
+class KReadableEvent;
+}
+namespace Service::Audio {
+class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
+public:
+    explicit IAudioRenderer(Core::System& system_, AudioCore::Renderer::Manager& manager_,
+                            AudioCore::AudioRendererParameterInternal& params,
+                            Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
+                            Kernel::KProcess* process_handle_, u64 applet_resource_user_id,
+                            s32 session_id);
+    ~IAudioRenderer() override;
+private:
+    Result GetSampleRate(Out<u32> out_sample_rate);
+    Result GetSampleCount(Out<u32> out_sample_count);
+    Result GetState(Out<u32> out_state);
+    Result GetMixBufferCount(Out<u32> out_mix_buffer_count);
+    Result RequestUpdate(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+                         OutBuffer<BufferAttr_HipcMapAlias> out_performance_buffer,
+                         InBuffer<BufferAttr_HipcMapAlias> input);
+    Result RequestUpdateAuto(OutBuffer<BufferAttr_HipcAutoSelect> out_buffer,
+                             OutBuffer<BufferAttr_HipcAutoSelect> out_performance_buffer,
+                             InBuffer<BufferAttr_HipcAutoSelect> input);
+    Result Start();
+    Result Stop();
+    Result QuerySystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result SetRenderingTimeLimit(u32 rendering_time_limit);
+    Result GetRenderingTimeLimit(Out<u32> out_rendering_time_limit);
+    Result SetVoiceDropParameter(f32 voice_drop_parameter);
+    Result GetVoiceDropParameter(Out<f32> out_voice_drop_parameter);
+    KernelHelpers::ServiceContext service_context;
+    Kernel::KEvent* rendered_event;
+    AudioCore::Renderer::Manager& manager;
+    std::unique_ptr<AudioCore::Renderer::Renderer> impl;
+    Kernel::KProcess* process_handle;
+    Common::ScratchBuffer<u8> output_buffer;
+    Common::ScratchBuffer<u8> performance_buffer;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_renderer_manager.cpp b/src/core/hle/service/audio/audio_renderer_manager.cpp
new file mode 100644
index 000000000..6a1345c07
--- /dev/null
+++ b/src/core/hle/service/audio/audio_renderer_manager.cpp
@@ -0,0 +1,104 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "audio_core/audio_render_manager.h"
+#include "audio_core/common/feature_support.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/k_transfer_memory.h"
+#include "core/hle/service/audio/audio_device.h"
+#include "core/hle/service/audio/audio_renderer.h"
+#include "core/hle/service/audio/audio_renderer_manager.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::Renderer;
+IAudioRendererManager::IAudioRendererManager(Core::System& system_)
+    : ServiceFramework{system_, "audren:u"}, impl{std::make_unique<Manager>(system_)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IAudioRendererManager::OpenAudioRenderer>, "OpenAudioRenderer"},
+        {1, D<&IAudioRendererManager::GetWorkBufferSize>, "GetWorkBufferSize"},
+        {2, D<&IAudioRendererManager::GetAudioDeviceService>, "GetAudioDeviceService"},
+        {3, nullptr, "OpenAudioRendererForManualExecution"},
+        {4, D<&IAudioRendererManager::GetAudioDeviceServiceWithRevisionInfo>, "GetAudioDeviceServiceWithRevisionInfo"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IAudioRendererManager::~IAudioRendererManager() = default;
+Result IAudioRendererManager::OpenAudioRenderer(
+    Out<SharedPointer<IAudioRenderer>> out_audio_renderer,
+    AudioCore::AudioRendererParameterInternal parameter,
+    InCopyHandle<Kernel::KTransferMemory> tmem_handle, u64 tmem_size,
+    InCopyHandle<Kernel::KProcess> process_handle, ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called");
+    if (impl->GetSessionCount() + 1 > AudioCore::MaxRendererSessions) {
+        LOG_ERROR(Service_Audio, "Too many AudioRenderer sessions open!");
+        R_THROW(Audio::ResultOutOfSessions);
+    }
+    const auto session_id{impl->GetSessionId()};
+    if (session_id == -1) {
+        LOG_ERROR(Service_Audio, "Tried to open a session that's already in use!");
+        R_THROW(Audio::ResultOutOfSessions);
+    }
+    LOG_DEBUG(Service_Audio, "Opened new AudioRenderer session {} sessions open {}", session_id,
+              impl->GetSessionCount());
+    *out_audio_renderer =
+        std::make_shared<IAudioRenderer>(system, *impl, parameter, tmem_handle.Get(), tmem_size,
+                                         process_handle.Get(), aruid.pid, session_id);
+    R_SUCCEED();
+}
+Result IAudioRendererManager::GetWorkBufferSize(Out<u64> out_size,
+                                                AudioCore::AudioRendererParameterInternal params) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_TRY(impl->GetWorkBufferSize(params, *out_size))
+    std::string output_info{};
+    output_info += fmt::format("\tRevision {}", AudioCore::GetRevisionNum(params.revision));
+    output_info +=
+        fmt::format("\n\tSample Rate {}, Sample Count {}", params.sample_rate, params.sample_count);
+    output_info += fmt::format("\n\tExecution Mode {}, Voice Drop Enabled {}",
+                               static_cast<u32>(params.execution_mode), params.voice_drop_enabled);
+    output_info += fmt::format(
+        "\n\tSizes: Effects {:04X}, Mixes {:04X}, Sinks {:04X}, Submixes {:04X}, Splitter Infos "
+        "{:04X}, Splitter Destinations {:04X}, Voices {:04X}, Performance Frames {:04X} External "
+        "Context {:04X}",
+        params.effects, params.mixes, params.sinks, params.sub_mixes, params.splitter_infos,
+        params.splitter_destinations, params.voices, params.perf_frames,
+        params.external_context_size);
+    LOG_DEBUG(Service_Audio, "called.\nInput params:\n{}\nOutput params:\n\tWorkbuffer size {:08X}",
+              output_info, *out_size);
+    R_SUCCEED();
+}
+Result IAudioRendererManager::GetAudioDeviceService(
+    Out<SharedPointer<IAudioDevice>> out_audio_device, ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called, aruid={:#x}", aruid.pid);
+    *out_audio_device = std::make_shared<IAudioDevice>(
+        system, aruid.pid, Common::MakeMagic('R', 'E', 'V', '1'), num_audio_devices++);
+    R_SUCCEED();
+}
+Result IAudioRendererManager::GetAudioDeviceServiceWithRevisionInfo(
+    Out<SharedPointer<IAudioDevice>> out_audio_device, u32 revision,
+    ClientAppletResourceUserId aruid) {
+    LOG_DEBUG(Service_Audio, "called, revision={} aruid={:#x}", AudioCore::GetRevisionNum(revision),
+              aruid.pid);
+    *out_audio_device =
+        std::make_shared<IAudioDevice>(system, aruid.pid, revision, num_audio_devices++);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio_renderer_manager.h b/src/core/hle/service/audio/audio_renderer_manager.h
new file mode 100644
index 000000000..69eee664c
--- /dev/null
+++ b/src/core/hle/service/audio/audio_renderer_manager.h
@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/audio_render_manager.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+class IAudioDevice;
+class IAudioRenderer;
+class IAudioRendererManager final : public ServiceFramework<IAudioRendererManager> {
+public:
+    explicit IAudioRendererManager(Core::System& system_);
+    ~IAudioRendererManager() override;
+private:
+    Result OpenAudioRenderer(Out<SharedPointer<IAudioRenderer>> out_audio_renderer,
+                             AudioCore::AudioRendererParameterInternal parameter,
+                             InCopyHandle<Kernel::KTransferMemory> tmem_handle, u64 tmem_size,
+                             InCopyHandle<Kernel::KProcess> process_handle,
+                             ClientAppletResourceUserId aruid);
+    Result GetWorkBufferSize(Out<u64> out_size,
+                             AudioCore::AudioRendererParameterInternal parameter);
+    Result GetAudioDeviceService(Out<SharedPointer<IAudioDevice>> out_audio_device,
+                                 ClientAppletResourceUserId aruid);
+    Result GetAudioDeviceServiceWithRevisionInfo(Out<SharedPointer<IAudioDevice>> out_audio_device,
+                                                 u32 revision, ClientAppletResourceUserId aruid);
+    std::unique_ptr<AudioCore::Renderer::Manager> impl;
+    u32 num_audio_devices{0};
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_u.cpp b/src/core/hle/service/audio/audout_u.cpp
deleted file mode 100644
index 8cc7b69f4..000000000
--- a/src/core/hle/service/audio/audout_u.cpp
+++ /dev/null
@@ -1,323 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#include <array>
-#include <cstring>
-#include <vector>
-#include "audio_core/out/audio_out_system.h"
-#include "audio_core/renderer/audio_device.h"
-#include "common/common_funcs.h"
-#include "common/logging/log.h"
-#include "common/scratch_buffer.h"
-#include "common/string_util.h"
-#include "common/swap.h"
-#include "core/core.h"
-#include "core/hle/kernel/k_event.h"
-#include "core/hle/service/audio/audout_u.h"
-#include "core/hle/service/audio/errors.h"
-#include "core/hle/service/ipc_helpers.h"
-#include "core/memory.h"
-namespace Service::Audio {
-using namespace AudioCore::AudioOut;
-class IAudioOut final : public ServiceFramework<IAudioOut> {
-public:
-    explicit IAudioOut(Core::System& system_, AudioCore::AudioOut::Manager& manager,
-                       size_t session_id, const std::string& device_name,
-                       const AudioOutParameter& in_params, Kernel::KProcess* handle,
-                       u64 applet_resource_user_id)
-        : ServiceFramework{system_, "IAudioOut"}, service_context{system_, "IAudioOut"},
-          event{service_context.CreateEvent("AudioOutEvent")}, process{handle},
-          impl{std::make_shared<AudioCore::AudioOut::Out>(system_, manager, event, session_id)} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, &IAudioOut::GetAudioOutState, "GetAudioOutState"},
-            {1, &IAudioOut::Start, "Start"},
-            {2, &IAudioOut::Stop, "Stop"},
-            {3, &IAudioOut::AppendAudioOutBuffer, "AppendAudioOutBuffer"},
-            {4, &IAudioOut::RegisterBufferEvent, "RegisterBufferEvent"},
-            {5, &IAudioOut::GetReleasedAudioOutBuffers, "GetReleasedAudioOutBuffers"},
-            {6, &IAudioOut::ContainsAudioOutBuffer, "ContainsAudioOutBuffer"},
-            {7, &IAudioOut::AppendAudioOutBuffer, "AppendAudioOutBufferAuto"},
-            {8, &IAudioOut::GetReleasedAudioOutBuffers, "GetReleasedAudioOutBuffersAuto"},
-            {9, &IAudioOut::GetAudioOutBufferCount, "GetAudioOutBufferCount"},
-            {10, &IAudioOut::GetAudioOutPlayedSampleCount, "GetAudioOutPlayedSampleCount"},
-            {11, &IAudioOut::FlushAudioOutBuffers, "FlushAudioOutBuffers"},
-            {12, &IAudioOut::SetAudioOutVolume, "SetAudioOutVolume"},
-            {13, &IAudioOut::GetAudioOutVolume, "GetAudioOutVolume"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-        process->Open();
-    }
-    ~IAudioOut() override {
-        impl->Free();
-        service_context.CloseEvent(event);
-        process->Close();
-    }
-    [[nodiscard]] std::shared_ptr<AudioCore::AudioOut::Out> GetImpl() {
-        return impl;
-    }
-private:
-    void GetAudioOutState(HLERequestContext& ctx) {
-        const auto state = static_cast<u32>(impl->GetState());
-        LOG_DEBUG(Service_Audio, "called. State={}", state);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(state);
-    }
-    void Start(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto result = impl->StartSystem();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void Stop(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto result = impl->StopSystem();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void AppendAudioOutBuffer(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        u64 tag = rp.PopRaw<u64>();
-        const auto in_buffer_size{ctx.GetReadBufferSize()};
-        if (in_buffer_size < sizeof(AudioOutBuffer)) {
-            LOG_ERROR(Service_Audio, "Input buffer is too small for an AudioOutBuffer!");
-        }
-        const auto& in_buffer = ctx.ReadBuffer();
-        AudioOutBuffer buffer{};
-        std::memcpy(&buffer, in_buffer.data(), sizeof(AudioOutBuffer));
-        LOG_TRACE(Service_Audio, "called. Session {} Appending buffer {:08X}",
-                  impl->GetSystem().GetSessionId(), tag);
-        auto result = impl->AppendBuffer(buffer, tag);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void RegisterBufferEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto& buffer_event = impl->GetBufferEvent();
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(buffer_event);
-    }
-    void GetReleasedAudioOutBuffers(HLERequestContext& ctx) {
-        const auto write_buffer_size = ctx.GetWriteBufferNumElements<u64>();
-        released_buffer.resize_destructive(write_buffer_size);
-        released_buffer[0] = 0;
-        const auto count = impl->GetReleasedBuffers(released_buffer);
-        ctx.WriteBuffer(released_buffer);
-        LOG_TRACE(Service_Audio, "called. Session {} released {} buffers",
-                  impl->GetSystem().GetSessionId(), count);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(count);
-    }
-    void ContainsAudioOutBuffer(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        const u64 tag{rp.Pop<u64>()};
-        const auto buffer_queued{impl->ContainsAudioBuffer(tag)};
-        LOG_DEBUG(Service_Audio, "called. Is buffer {:08X} registered? {}", tag, buffer_queued);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(buffer_queued);
-    }
-    void GetAudioOutBufferCount(HLERequestContext& ctx) {
-        const auto buffer_count = impl->GetBufferCount();
-        LOG_DEBUG(Service_Audio, "called. Buffer count={}", buffer_count);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(buffer_count);
-    }
-    void GetAudioOutPlayedSampleCount(HLERequestContext& ctx) {
-        const auto samples_played = impl->GetPlayedSampleCount();
-        LOG_DEBUG(Service_Audio, "called. Played samples={}", samples_played);
-        IPC::ResponseBuilder rb{ctx, 4};
-        rb.Push(ResultSuccess);
-        rb.Push(samples_played);
-    }
-    void FlushAudioOutBuffers(HLERequestContext& ctx) {
-        bool flushed{impl->FlushAudioOutBuffers()};
-        LOG_DEBUG(Service_Audio, "called. Were any buffers flushed? {}", flushed);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(flushed);
-    }
-    void SetAudioOutVolume(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        const auto volume = rp.Pop<f32>();
-        LOG_DEBUG(Service_Audio, "called. Volume={}", volume);
-        impl->SetVolume(volume);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void GetAudioOutVolume(HLERequestContext& ctx) {
-        const auto volume = impl->GetVolume();
-        LOG_DEBUG(Service_Audio, "called. Volume={}", volume);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(volume);
-    }
-    KernelHelpers::ServiceContext service_context;
-    Kernel::KEvent* event;
-    Kernel::KProcess* process;
-    std::shared_ptr<AudioCore::AudioOut::Out> impl;
-    Common::ScratchBuffer<u64> released_buffer;
-};
-AudOutU::AudOutU(Core::System& system_)
-    : ServiceFramework{system_, "audout:u"}, service_context{system_, "AudOutU"},
-      impl{std::make_unique<AudioCore::AudioOut::Manager>(system_)} {
-    // clang-format off
-    static const FunctionInfo functions[] = {
-        {0, &AudOutU::ListAudioOuts, "ListAudioOuts"},
-        {1, &AudOutU::OpenAudioOut, "OpenAudioOut"},
-        {2, &AudOutU::ListAudioOuts, "ListAudioOutsAuto"},
-        {3, &AudOutU::OpenAudioOut, "OpenAudioOutAuto"},
-    };
-    // clang-format on
-    RegisterHandlers(functions);
-}
-AudOutU::~AudOutU() = default;
-void AudOutU::ListAudioOuts(HLERequestContext& ctx) {
-    using namespace AudioCore::Renderer;
-    std::scoped_lock l{impl->mutex};
-    const auto write_count =
-        static_cast<u32>(ctx.GetWriteBufferNumElements<AudioDevice::AudioDeviceName>());
-    std::vector<AudioDevice::AudioDeviceName> device_names{};
-    if (write_count > 0) {
-        device_names.emplace_back("DeviceOut");
-        LOG_DEBUG(Service_Audio, "called. \nName=DeviceOut");
-    } else {
-        LOG_DEBUG(Service_Audio, "called. Empty buffer passed in.");
-    }
-    ctx.WriteBuffer(device_names);
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(ResultSuccess);
-    rb.Push<u32>(static_cast<u32>(device_names.size()));
-}
-void AudOutU::OpenAudioOut(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto in_params{rp.PopRaw<AudioOutParameter>()};
-    auto applet_resource_user_id{rp.PopRaw<u64>()};
-    const auto device_name_data{ctx.ReadBuffer()};
-    auto device_name = Common::StringFromBuffer(device_name_data);
-    auto handle{ctx.GetCopyHandle(0)};
-    auto process{ctx.GetObjectFromHandle<Kernel::KProcess>(handle)};
-    if (process.IsNull()) {
-        LOG_ERROR(Service_Audio, "Failed to get process handle");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultUnknown);
-        return;
-    }
-    auto link{impl->LinkToManager()};
-    if (link.IsError()) {
-        LOG_ERROR(Service_Audio, "Failed to link Audio Out to Audio Manager");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(link);
-        return;
-    }
-    size_t new_session_id{};
-    auto result{impl->AcquireSessionId(new_session_id)};
-    if (result.IsError()) {
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    LOG_DEBUG(Service_Audio, "Opening new AudioOut, sessionid={}, free sessions={}", new_session_id,
-              impl->num_free_sessions);
-    auto audio_out =
-        std::make_shared<IAudioOut>(system, *impl, new_session_id, device_name, in_params,
-                                    process.GetPointerUnsafe(), applet_resource_user_id);
-    result = audio_out->GetImpl()->GetSystem().Initialize(
-        device_name, in_params, process.GetPointerUnsafe(), applet_resource_user_id);
-    if (result.IsError()) {
-        LOG_ERROR(Service_Audio, "Failed to initialize the AudioOut System!");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    impl->sessions[new_session_id] = audio_out->GetImpl();
-    impl->applet_resource_user_ids[new_session_id] = applet_resource_user_id;
-    auto& out_system = impl->sessions[new_session_id]->GetSystem();
-    AudioOutParameterInternal out_params{.sample_rate = out_system.GetSampleRate(),
-                                         .channel_count = out_system.GetChannelCount(),
-                                         .sample_format =
-                                             static_cast<u32>(out_system.GetSampleFormat()),
-                                         .state = static_cast<u32>(out_system.GetState())};
-    IPC::ResponseBuilder rb{ctx, 6, 0, 1};
-    ctx.WriteBuffer(out_system.GetName());
-    rb.Push(ResultSuccess);
-    rb.PushRaw<AudioOutParameterInternal>(out_params);
-    rb.PushIpcInterface<IAudioOut>(audio_out);
-}
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_u.h b/src/core/hle/service/audio/audout_u.h
deleted file mode 100644
index 8f288c6e0..000000000
--- a/src/core/hle/service/audio/audout_u.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#pragma once
-#include "audio_core/audio_out_manager.h"
-#include "audio_core/out/audio_out.h"
-#include "core/hle/service/kernel_helpers.h"
-#include "core/hle/service/service.h"
-namespace Core {
-class System;
-}
-namespace AudioCore::AudioOut {
-class Manager;
-class Out;
-} // namespace AudioCore::AudioOut
-namespace Service::Audio {
-class IAudioOut;
-class AudOutU final : public ServiceFramework<AudOutU> {
-public:
-    explicit AudOutU(Core::System& system_);
-    ~AudOutU() override;
-private:
-    void ListAudioOuts(HLERequestContext& ctx);
-    void OpenAudioOut(HLERequestContext& ctx);
-    KernelHelpers::ServiceContext service_context;
-    std::unique_ptr<AudioCore::AudioOut::Manager> impl;
-};
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audren_u.cpp b/src/core/hle/service/audio/audren_u.cpp
deleted file mode 100644
index 10108abc0..000000000
--- a/src/core/hle/service/audio/audren_u.cpp
+++ /dev/null
@@ -1,552 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#include <array>
-#include <memory>
-#include "audio_core/audio_core.h"
-#include "audio_core/common/audio_renderer_parameter.h"
-#include "audio_core/common/feature_support.h"
-#include "audio_core/renderer/audio_device.h"
-#include "audio_core/renderer/audio_renderer.h"
-#include "audio_core/renderer/voice/voice_info.h"
-#include "common/alignment.h"
-#include "common/bit_util.h"
-#include "common/common_funcs.h"
-#include "common/logging/log.h"
-#include "common/polyfill_ranges.h"
-#include "common/scratch_buffer.h"
-#include "common/string_util.h"
-#include "core/core.h"
-#include "core/hle/kernel/k_event.h"
-#include "core/hle/kernel/k_process.h"
-#include "core/hle/kernel/k_transfer_memory.h"
-#include "core/hle/service/audio/audren_u.h"
-#include "core/hle/service/audio/errors.h"
-#include "core/hle/service/ipc_helpers.h"
-#include "core/memory.h"
-using namespace AudioCore::Renderer;
-namespace Service::Audio {
-class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
-public:
-    explicit IAudioRenderer(Core::System& system_, Manager& manager_,
-                            AudioCore::AudioRendererParameterInternal& params,
-                            Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size,
-                            u32 process_handle, Kernel::KProcess& process_,
-                            u64 applet_resource_user_id, s32 session_id)
-        : ServiceFramework{system_, "IAudioRenderer"}, service_context{system_, "IAudioRenderer"},
-          rendered_event{service_context.CreateEvent("IAudioRendererEvent")}, manager{manager_},
-          impl{std::make_unique<Renderer>(system_, manager, rendered_event)}, process{process_} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, &IAudioRenderer::GetSampleRate, "GetSampleRate"},
-            {1, &IAudioRenderer::GetSampleCount, "GetSampleCount"},
-            {2, &IAudioRenderer::GetMixBufferCount, "GetMixBufferCount"},
-            {3, &IAudioRenderer::GetState, "GetState"},
-            {4, &IAudioRenderer::RequestUpdate, "RequestUpdate"},
-            {5, &IAudioRenderer::Start, "Start"},
-            {6, &IAudioRenderer::Stop, "Stop"},
-            {7, &IAudioRenderer::QuerySystemEvent, "QuerySystemEvent"},
-            {8, &IAudioRenderer::SetRenderingTimeLimit, "SetRenderingTimeLimit"},
-            {9, &IAudioRenderer::GetRenderingTimeLimit, "GetRenderingTimeLimit"},
-            {10, &IAudioRenderer::RequestUpdate, "RequestUpdateAuto"},
-            {11, nullptr, "ExecuteAudioRendererRendering"},
-            {12, &IAudioRenderer::SetVoiceDropParameter, "SetVoiceDropParameter"},
-            {13, &IAudioRenderer::GetVoiceDropParameter, "GetVoiceDropParameter"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-        process.Open();
-        impl->Initialize(params, transfer_memory, transfer_memory_size, process_handle, process,
-                         applet_resource_user_id, session_id);
-    }
-    ~IAudioRenderer() override {
-        impl->Finalize();
-        service_context.CloseEvent(rendered_event);
-        process.Close();
-    }
-private:
-    void GetSampleRate(HLERequestContext& ctx) {
-        const auto sample_rate{impl->GetSystem().GetSampleRate()};
-        LOG_DEBUG(Service_Audio, "called. Sample rate {}", sample_rate);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(sample_rate);
-    }
-    void GetSampleCount(HLERequestContext& ctx) {
-        const auto sample_count{impl->GetSystem().GetSampleCount()};
-        LOG_DEBUG(Service_Audio, "called. Sample count {}", sample_count);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(sample_count);
-    }
-    void GetState(HLERequestContext& ctx) {
-        const u32 state{!impl->GetSystem().IsActive()};
-        LOG_DEBUG(Service_Audio, "called, state {}", state);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(state);
-    }
-    void GetMixBufferCount(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        const auto buffer_count{impl->GetSystem().GetMixBufferCount()};
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(buffer_count);
-    }
-    void RequestUpdate(HLERequestContext& ctx) {
-        LOG_TRACE(Service_Audio, "called");
-        const auto input{ctx.ReadBuffer(0)};
-        // These buffers are written manually to avoid an issue with WriteBuffer throwing errors for
-        // checking size 0. Performance size is 0 for most games.
-        auto is_buffer_b{ctx.BufferDescriptorB()[0].Size() != 0};
-        if (is_buffer_b) {
-            const auto buffersB{ctx.BufferDescriptorB()};
-            output_buffer.resize_destructive(buffersB[0].Size());
-            performance_buffer.resize_destructive(buffersB[1].Size());
-        } else {
-            const auto buffersC{ctx.BufferDescriptorC()};
-            output_buffer.resize_destructive(buffersC[0].Size());
-            performance_buffer.resize_destructive(buffersC[1].Size());
-        }
-        auto result = impl->RequestUpdate(input, performance_buffer, output_buffer);
-        if (result.IsSuccess()) {
-            if (is_buffer_b) {
-                ctx.WriteBufferB(output_buffer.data(), output_buffer.size(), 0);
-                ctx.WriteBufferB(performance_buffer.data(), performance_buffer.size(), 1);
-            } else {
-                ctx.WriteBufferC(output_buffer.data(), output_buffer.size(), 0);
-                ctx.WriteBufferC(performance_buffer.data(), performance_buffer.size(), 1);
-            }
-        } else {
-            LOG_ERROR(Service_Audio, "RequestUpdate failed error 0x{:02X}!",
-                      result.GetDescription());
-        }
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void Start(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        impl->Start();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void Stop(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        impl->Stop();
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void QuerySystemEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        if (impl->GetSystem().GetExecutionMode() == AudioCore::ExecutionMode::Manual) {
-            IPC::ResponseBuilder rb{ctx, 2};
-            rb.Push(Audio::ResultNotSupported);
-            return;
-        }
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(rendered_event->GetReadableEvent());
-    }
-    void SetRenderingTimeLimit(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        IPC::RequestParser rp{ctx};
-        auto limit = rp.PopRaw<u32>();
-        auto& system_ = impl->GetSystem();
-        system_.SetRenderingTimeLimit(limit);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void GetRenderingTimeLimit(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto& system_ = impl->GetSystem();
-        auto time = system_.GetRenderingTimeLimit();
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(time);
-    }
-    void ExecuteAudioRendererRendering(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-    }
-    void SetVoiceDropParameter(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        IPC::RequestParser rp{ctx};
-        auto voice_drop_param{rp.Pop<f32>()};
-        auto& system_ = impl->GetSystem();
-        system_.SetVoiceDropParameter(voice_drop_param);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void GetVoiceDropParameter(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        auto& system_ = impl->GetSystem();
-        auto voice_drop_param{system_.GetVoiceDropParameter()};
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(voice_drop_param);
-    }
-    KernelHelpers::ServiceContext service_context;
-    Kernel::KEvent* rendered_event;
-    Manager& manager;
-    std::unique_ptr<Renderer> impl;
-    Kernel::KProcess& process;
-    Common::ScratchBuffer<u8> output_buffer;
-    Common::ScratchBuffer<u8> performance_buffer;
-};
-class IAudioDevice final : public ServiceFramework<IAudioDevice> {
-public:
-    explicit IAudioDevice(Core::System& system_, u64 applet_resource_user_id, u32 revision,
-                          u32 device_num)
-        : ServiceFramework{system_, "IAudioDevice"}, service_context{system_, "IAudioDevice"},
-          impl{std::make_unique<AudioDevice>(system_, applet_resource_user_id, revision)},
-          event{service_context.CreateEvent(fmt::format("IAudioDeviceEvent-{}", device_num))} {
-        static const FunctionInfo functions[] = {
-            {0, &IAudioDevice::ListAudioDeviceName, "ListAudioDeviceName"},
-            {1, &IAudioDevice::SetAudioDeviceOutputVolume, "SetAudioDeviceOutputVolume"},
-            {2, &IAudioDevice::GetAudioDeviceOutputVolume, "GetAudioDeviceOutputVolume"},
-            {3, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceName"},
-            {4, &IAudioDevice::QueryAudioDeviceSystemEvent, "QueryAudioDeviceSystemEvent"},
-            {5, &IAudioDevice::GetActiveChannelCount, "GetActiveChannelCount"},
-            {6, &IAudioDevice::ListAudioDeviceName, "ListAudioDeviceNameAuto"},
-            {7, &IAudioDevice::SetAudioDeviceOutputVolume, "SetAudioDeviceOutputVolumeAuto"},
-            {8, &IAudioDevice::GetAudioDeviceOutputVolume, "GetAudioDeviceOutputVolumeAuto"},
-            {10, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceNameAuto"},
-            {11, &IAudioDevice::QueryAudioDeviceInputEvent, "QueryAudioDeviceInputEvent"},
-            {12, &IAudioDevice::QueryAudioDeviceOutputEvent, "QueryAudioDeviceOutputEvent"},
-            {13, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioOutputDeviceName"},
-            {14, &IAudioDevice::ListAudioOutputDeviceName, "ListAudioOutputDeviceName"},
-        };
-        RegisterHandlers(functions);
-        event->Signal();
-    }
-    ~IAudioDevice() override {
-        service_context.CloseEvent(event);
-    }
-private:
-    void ListAudioDeviceName(HLERequestContext& ctx) {
-        const size_t in_count = ctx.GetWriteBufferNumElements<AudioDevice::AudioDeviceName>();
-        std::vector<AudioDevice::AudioDeviceName> out_names{};
-        const u32 out_count = impl->ListAudioDeviceName(out_names, in_count);
-        std::string out{};
-        for (u32 i = 0; i < out_count; i++) {
-            std::string a{};
-            u32 j = 0;
-            while (out_names[i].name[j] != '\0') {
-                a += out_names[i].name[j];
-                j++;
-            }
-            out += "\n\t" + a;
-        }
-        LOG_DEBUG(Service_Audio, "called.\nNames={}", out);
-        IPC::ResponseBuilder rb{ctx, 3};
-        ctx.WriteBuffer(out_names);
-        rb.Push(ResultSuccess);
-        rb.Push(out_count);
-    }
-    void SetAudioDeviceOutputVolume(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        const f32 volume = rp.Pop<f32>();
-        const auto device_name_buffer = ctx.ReadBuffer();
-        const std::string name = Common::StringFromBuffer(device_name_buffer);
-        LOG_DEBUG(Service_Audio, "called. name={}, volume={}", name, volume);
-        if (name == "AudioTvOutput") {
-            impl->SetDeviceVolumes(volume);
-        }
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void GetAudioDeviceOutputVolume(HLERequestContext& ctx) {
-        const auto device_name_buffer = ctx.ReadBuffer();
-        const std::string name = Common::StringFromBuffer(device_name_buffer);
-        LOG_DEBUG(Service_Audio, "called. Name={}", name);
-        f32 volume{1.0f};
-        if (name == "AudioTvOutput") {
-            volume = impl->GetDeviceVolume(name);
-        }
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push(volume);
-    }
-    void GetActiveAudioDeviceName(HLERequestContext& ctx) {
-        const auto write_size = ctx.GetWriteBufferSize();
-        std::string out_name{"AudioTvOutput"};
-        LOG_DEBUG(Service_Audio, "(STUBBED) called. Name={}", out_name);
-        out_name.resize(write_size);
-        ctx.WriteBuffer(out_name);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void QueryAudioDeviceSystemEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "(STUBBED) called");
-        event->Signal();
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(event->GetReadableEvent());
-    }
-    void GetActiveChannelCount(HLERequestContext& ctx) {
-        const auto& sink{system.AudioCore().GetOutputSink()};
-        u32 channel_count{sink.GetSystemChannels()};
-        LOG_DEBUG(Service_Audio, "(STUBBED) called. Channels={}", channel_count);
-        IPC::ResponseBuilder rb{ctx, 3};
-        rb.Push(ResultSuccess);
-        rb.Push<u32>(channel_count);
-    }
-    void QueryAudioDeviceInputEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "(STUBBED) called");
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(event->GetReadableEvent());
-    }
-    void QueryAudioDeviceOutputEvent(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_Audio, "called");
-        IPC::ResponseBuilder rb{ctx, 2, 1};
-        rb.Push(ResultSuccess);
-        rb.PushCopyObjects(event->GetReadableEvent());
-    }
-    void ListAudioOutputDeviceName(HLERequestContext& ctx) {
-        const size_t in_count = ctx.GetWriteBufferNumElements<AudioDevice::AudioDeviceName>();
-        std::vector<AudioDevice::AudioDeviceName> out_names{};
-        const u32 out_count = impl->ListAudioOutputDeviceName(out_names, in_count);
-        std::string out{};
-        for (u32 i = 0; i < out_count; i++) {
-            std::string a{};
-            u32 j = 0;
-            while (out_names[i].name[j] != '\0') {
-                a += out_names[i].name[j];
-                j++;
-            }
-            out += "\n\t" + a;
-        }
-        LOG_DEBUG(Service_Audio, "called.\nNames={}", out);
-        IPC::ResponseBuilder rb{ctx, 3};
-        ctx.WriteBuffer(out_names);
-        rb.Push(ResultSuccess);
-        rb.Push(out_count);
-    }
-    KernelHelpers::ServiceContext service_context;
-    std::unique_ptr<AudioDevice> impl;
-    Kernel::KEvent* event;
-};
-AudRenU::AudRenU(Core::System& system_)
-    : ServiceFramework{system_, "audren:u"},
-      service_context{system_, "audren:u"}, impl{std::make_unique<Manager>(system_)} {
-    // clang-format off
-    static const FunctionInfo functions[] = {
-        {0, &AudRenU::OpenAudioRenderer, "OpenAudioRenderer"},
-        {1, &AudRenU::GetWorkBufferSize, "GetWorkBufferSize"},
-        {2, &AudRenU::GetAudioDeviceService, "GetAudioDeviceService"},
-        {3, nullptr, "OpenAudioRendererForManualExecution"},
-        {4, &AudRenU::GetAudioDeviceServiceWithRevisionInfo, "GetAudioDeviceServiceWithRevisionInfo"},
-    };
-    // clang-format on
-    RegisterHandlers(functions);
-}
-AudRenU::~AudRenU() = default;
-void AudRenU::OpenAudioRenderer(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    AudioCore::AudioRendererParameterInternal params;
-    rp.PopRaw<AudioCore::AudioRendererParameterInternal>(params);
-    rp.Skip(1, false);
-    auto transfer_memory_size = rp.Pop<u64>();
-    auto applet_resource_user_id = rp.Pop<u64>();
-    auto transfer_memory_handle = ctx.GetCopyHandle(0);
-    auto process_handle = ctx.GetCopyHandle(1);
-    if (impl->GetSessionCount() + 1 > AudioCore::MaxRendererSessions) {
-        LOG_ERROR(Service_Audio, "Too many AudioRenderer sessions open!");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(Audio::ResultOutOfSessions);
-        return;
-    }
-    auto process{ctx.GetObjectFromHandle<Kernel::KProcess>(process_handle).GetPointerUnsafe()};
-    auto transfer_memory{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(transfer_memory_handle)};
-    const auto session_id{impl->GetSessionId()};
-    if (session_id == -1) {
-        LOG_ERROR(Service_Audio, "Tried to open a session that's already in use!");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(Audio::ResultOutOfSessions);
-        return;
-    }
-    LOG_DEBUG(Service_Audio, "Opened new AudioRenderer session {} sessions open {}", session_id,
-              impl->GetSessionCount());
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IAudioRenderer>(system, *impl, params, transfer_memory.GetPointerUnsafe(),
-                                        transfer_memory_size, process_handle, *process,
-                                        applet_resource_user_id, session_id);
-}
-void AudRenU::GetWorkBufferSize(HLERequestContext& ctx) {
-    AudioCore::AudioRendererParameterInternal params;
-    IPC::RequestParser rp{ctx};
-    rp.PopRaw<AudioCore::AudioRendererParameterInternal>(params);
-    u64 size{0};
-    auto result = impl->GetWorkBufferSize(params, size);
-    std::string output_info{};
-    output_info += fmt::format("\tRevision {}", AudioCore::GetRevisionNum(params.revision));
-    output_info +=
-        fmt::format("\n\tSample Rate {}, Sample Count {}", params.sample_rate, params.sample_count);
-    output_info += fmt::format("\n\tExecution Mode {}, Voice Drop Enabled {}",
-                               static_cast<u32>(params.execution_mode), params.voice_drop_enabled);
-    output_info += fmt::format(
-        "\n\tSizes: Effects {:04X}, Mixes {:04X}, Sinks {:04X}, Submixes {:04X}, Splitter Infos "
-        "{:04X}, Splitter Destinations {:04X}, Voices {:04X}, Performance Frames {:04X} External "
-        "Context {:04X}",
-        params.effects, params.mixes, params.sinks, params.sub_mixes, params.splitter_infos,
-        params.splitter_destinations, params.voices, params.perf_frames,
-        params.external_context_size);
-    LOG_DEBUG(Service_Audio, "called.\nInput params:\n{}\nOutput params:\n\tWorkbuffer size {:08X}",
-              output_info, size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push<u64>(size);
-}
-void AudRenU::GetAudioDeviceService(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    const auto applet_resource_user_id = rp.Pop<u64>();
-    LOG_DEBUG(Service_Audio, "called. Applet resource id {}", applet_resource_user_id);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IAudioDevice>(system, applet_resource_user_id,
-                                      ::Common::MakeMagic('R', 'E', 'V', '1'), num_audio_devices++);
-}
-void AudRenU::OpenAudioRendererForManualExecution(HLERequestContext& ctx) {
-    LOG_ERROR(Service_Audio, "called. Implement me!");
-}
-void AudRenU::GetAudioDeviceServiceWithRevisionInfo(HLERequestContext& ctx) {
-    struct Parameters {
-        u32 revision;
-        u64 applet_resource_user_id;
-    };
-    IPC::RequestParser rp{ctx};
-    const auto [revision, applet_resource_user_id] = rp.PopRaw<Parameters>();
-    LOG_DEBUG(Service_Audio, "called. Revision {} Applet resource id {}",
-              AudioCore::GetRevisionNum(revision), applet_resource_user_id);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IAudioDevice>(system, applet_resource_user_id, revision,
-                                      num_audio_devices++);
-}
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audren_u.h b/src/core/hle/service/audio/audren_u.h
deleted file mode 100644
index 3d7993a16..000000000
--- a/src/core/hle/service/audio/audren_u.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#pragma once
-#include "audio_core/audio_render_manager.h"
-#include "common/scratch_buffer.h"
-#include "core/hle/service/kernel_helpers.h"
-#include "core/hle/service/service.h"
-namespace Core {
-class System;
-}
-namespace Service::Audio {
-class IAudioRenderer;
-class AudRenU final : public ServiceFramework<AudRenU> {
-public:
-    explicit AudRenU(Core::System& system_);
-    ~AudRenU() override;
-private:
-    void OpenAudioRenderer(HLERequestContext& ctx);
-    void GetWorkBufferSize(HLERequestContext& ctx);
-    void GetAudioDeviceService(HLERequestContext& ctx);
-    void OpenAudioRendererForManualExecution(HLERequestContext& ctx);
-    void GetAudioDeviceServiceWithRevisionInfo(HLERequestContext& ctx);
-    KernelHelpers::ServiceContext service_context;
-    std::unique_ptr<AudioCore::Renderer::Manager> impl;
-    u32 num_audio_devices{0};
-};
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_u.cpp b/src/core/hle/service/audio/final_output_recorder_manager.cpp
index bc55cec17..f70a0e62d 100644
--- a/src/core/hle/service/audio/audrec_u.cpp
+++ b/src/core/hle/service/audio/final_output_recorder_manager.cpp
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
-#include "core/hle/service/audio/audrec_u.h"
+#include "core/hle/service/audio/final_output_recorder_manager.h"
 namespace Service::Audio {
@@ -30,13 +30,14 @@ public:
    }
 };
-AudRecU::AudRecU(Core::System& system_) : ServiceFramework{system_, "audrec:u"} {
+IFinalOutputRecorderManager::IFinalOutputRecorderManager(Core::System& system_)
+    : ServiceFramework{system_, "audrec:u"} {
    static const FunctionInfo functions[] = {
        {0, nullptr, "OpenFinalOutputRecorder"},
    };
    RegisterHandlers(functions);
 }
-AudRecU::~AudRecU() = default;
+IFinalOutputRecorderManager::~IFinalOutputRecorderManager() = default;
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_a.h b/src/core/hle/service/audio/final_output_recorder_manager.h
index 9edf89f6c..0663b894e 100644
--- a/src/core/hle/service/audio/audrec_a.h
+++ b/src/core/hle/service/audio/final_output_recorder_manager.h
@@ -11,10 +11,10 @@ class System;
 namespace Service::Audio {
-class AudRecA final : public ServiceFramework<AudRecA> {
+class IFinalOutputRecorderManager final : public ServiceFramework<IFinalOutputRecorderManager> {
 public:
-    explicit AudRecA(Core::System& system_);
+    explicit IFinalOutputRecorderManager(Core::System& system_);
-    ~AudRecA() override;
+    ~IFinalOutputRecorderManager() override;
 };
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_a.cpp b/src/core/hle/service/audio/final_output_recorder_manager_for_applet.cpp
index fa82e9ac7..7e2e42bbe 100644
--- a/src/core/hle/service/audio/audrec_a.cpp
+++ b/src/core/hle/service/audio/final_output_recorder_manager_for_applet.cpp
@@ -1,11 +1,12 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
-#include "core/hle/service/audio/audrec_a.h"
+#include "core/hle/service/audio/final_output_recorder_manager_for_applet.h"
 namespace Service::Audio {
-AudRecA::AudRecA(Core::System& system_) : ServiceFramework{system_, "audrec:a"} {
+IFinalOutputRecorderManagerForApplet::IFinalOutputRecorderManagerForApplet(Core::System& system_)
+    : ServiceFramework{system_, "audrec:a"} {
    // clang-format off
    static const FunctionInfo functions[] = {
        {0, nullptr, "RequestSuspend"},
@@ -16,6 +17,6 @@ AudRecA::AudRecA(Core::System& system_) : ServiceFramework{system_, "audrec:a"}
    RegisterHandlers(functions);
 }
-AudRecA::~AudRecA() = default;
+IFinalOutputRecorderManagerForApplet::~IFinalOutputRecorderManagerForApplet() = default;
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_u.h b/src/core/hle/service/audio/final_output_recorder_manager_for_applet.h
index 8b4817884..27940f7e0 100644
--- a/src/core/hle/service/audio/audrec_u.h
+++ b/src/core/hle/service/audio/final_output_recorder_manager_for_applet.h
@@ -11,10 +11,11 @@ class System;
 namespace Service::Audio {
-class AudRecU final : public ServiceFramework<AudRecU> {
+class IFinalOutputRecorderManagerForApplet final
+    : public ServiceFramework<IFinalOutputRecorderManagerForApplet> {
 public:
-    explicit AudRecU(Core::System& system_);
+    explicit IFinalOutputRecorderManagerForApplet(Core::System& system_);
-    ~AudRecU() override;
+    ~IFinalOutputRecorderManagerForApplet() override;
 };
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hardware_opus_decoder.cpp b/src/core/hle/service/audio/hardware_opus_decoder.cpp
new file mode 100644
index 000000000..03d3374c1
--- /dev/null
+++ b/src/core/hle/service/audio/hardware_opus_decoder.cpp
@@ -0,0 +1,145 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/audio/hardware_opus_decoder.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::OpusDecoder;
+IHardwareOpusDecoder::IHardwareOpusDecoder(Core::System& system_, HardwareOpus& hardware_opus)
+    : ServiceFramework{system_, "IHardwareOpusDecoder"},
+      impl{std::make_unique<AudioCore::OpusDecoder::OpusDecoder>(system_, hardware_opus)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IHardwareOpusDecoder::DecodeInterleavedOld>, "DecodeInterleavedOld"},
+        {1, D<&IHardwareOpusDecoder::SetContext>, "SetContext"},
+        {2, D<&IHardwareOpusDecoder::DecodeInterleavedForMultiStreamOld>, "DecodeInterleavedForMultiStreamOld"},
+        {3, D<&IHardwareOpusDecoder::SetContextForMultiStream>, "SetContextForMultiStream"},
+        {4, D<&IHardwareOpusDecoder::DecodeInterleavedWithPerfOld>, "DecodeInterleavedWithPerfOld"},
+        {5, D<&IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfOld>, "DecodeInterleavedForMultiStreamWithPerfOld"},
+        {6, D<&IHardwareOpusDecoder::DecodeInterleavedWithPerfAndResetOld>, "DecodeInterleavedWithPerfAndResetOld"},
+        {7, D<&IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfAndResetOld>, "DecodeInterleavedForMultiStreamWithPerfAndResetOld"},
+        {8, D<&IHardwareOpusDecoder::DecodeInterleaved>, "DecodeInterleaved"},
+        {9, D<&IHardwareOpusDecoder::DecodeInterleavedForMultiStream>, "DecodeInterleavedForMultiStream"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IHardwareOpusDecoder::~IHardwareOpusDecoder() = default;
+Result IHardwareOpusDecoder::Initialize(const OpusParametersEx& params,
+                                        Kernel::KTransferMemory* transfer_memory,
+                                        u64 transfer_memory_size) {
+    return impl->Initialize(params, transfer_memory, transfer_memory_size);
+}
+Result IHardwareOpusDecoder::Initialize(const OpusMultiStreamParametersEx& params,
+                                        Kernel::KTransferMemory* transfer_memory,
+                                        u64 transfer_memory_size) {
+    return impl->Initialize(params, transfer_memory, transfer_memory_size);
+}
+Result IHardwareOpusDecoder::DecodeInterleavedOld(OutBuffer<BufferAttr_HipcMapAlias> out_pcm_data,
+                                                  Out<u32> out_data_size, Out<u32> out_sample_count,
+                                                  InBuffer<BufferAttr_HipcMapAlias> opus_data) {
+    R_TRY(impl->DecodeInterleaved(out_data_size, nullptr, out_sample_count, opus_data, out_pcm_data,
+                                  false));
+    LOG_DEBUG(Service_Audio, "bytes read {:#x} samples generated {}", *out_data_size,
+              *out_sample_count);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::SetContext(InBuffer<BufferAttr_HipcMapAlias> decoder_context) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->SetContext(decoder_context));
+}
+Result IHardwareOpusDecoder::DecodeInterleavedForMultiStreamOld(
+    OutBuffer<BufferAttr_HipcMapAlias> out_pcm_data, Out<u32> out_data_size,
+    Out<u32> out_sample_count, InBuffer<BufferAttr_HipcMapAlias> opus_data) {
+    R_TRY(impl->DecodeInterleavedForMultiStream(out_data_size, nullptr, out_sample_count, opus_data,
+                                                out_pcm_data, false));
+    LOG_DEBUG(Service_Audio, "bytes read {:#x} samples generated {}", *out_data_size,
+              *out_sample_count);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::SetContextForMultiStream(
+    InBuffer<BufferAttr_HipcMapAlias> decoder_context) {
+    LOG_DEBUG(Service_Audio, "called");
+    R_RETURN(impl->SetContext(decoder_context));
+}
+Result IHardwareOpusDecoder::DecodeInterleavedWithPerfOld(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias> opus_data) {
+    R_TRY(impl->DecodeInterleaved(out_data_size, out_time_taken, out_sample_count, opus_data,
+                                  out_pcm_data, false));
+    LOG_DEBUG(Service_Audio, "bytes read {:#x} samples generated {} time taken {}", *out_data_size,
+              *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfOld(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias> opus_data) {
+    R_TRY(impl->DecodeInterleavedForMultiStream(out_data_size, out_time_taken, out_sample_count,
+                                                opus_data, out_pcm_data, false));
+    LOG_DEBUG(Service_Audio, "bytes read {:#x} samples generated {} time taken {}", *out_data_size,
+              *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::DecodeInterleavedWithPerfAndResetOld(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias> opus_data, bool reset) {
+    R_TRY(impl->DecodeInterleaved(out_data_size, out_time_taken, out_sample_count, opus_data,
+                                  out_pcm_data, reset));
+    LOG_DEBUG(Service_Audio, "reset {} bytes read {:#x} samples generated {} time taken {}", reset,
+              *out_data_size, *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfAndResetOld(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias> opus_data, bool reset) {
+    R_TRY(impl->DecodeInterleavedForMultiStream(out_data_size, out_time_taken, out_sample_count,
+                                                opus_data, out_pcm_data, reset));
+    LOG_DEBUG(Service_Audio, "reset {} bytes read {:#x} samples generated {} time taken {}", reset,
+              *out_data_size, *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::DecodeInterleaved(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> opus_data,
+    bool reset) {
+    R_TRY(impl->DecodeInterleaved(out_data_size, out_time_taken, out_sample_count, opus_data,
+                                  out_pcm_data, reset));
+    LOG_DEBUG(Service_Audio, "reset {} bytes read {:#x} samples generated {} time taken {}", reset,
+              *out_data_size, *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoder::DecodeInterleavedForMultiStream(
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+    Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+    InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> opus_data,
+    bool reset) {
+    R_TRY(impl->DecodeInterleavedForMultiStream(out_data_size, out_time_taken, out_sample_count,
+                                                opus_data, out_pcm_data, reset));
+    LOG_DEBUG(Service_Audio, "reset {} bytes read {:#x} samples generated {} time taken {}", reset,
+              *out_data_size, *out_sample_count, *out_time_taken);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hardware_opus_decoder.h b/src/core/hle/service/audio/hardware_opus_decoder.h
new file mode 100644
index 000000000..511bf46bd
--- /dev/null
+++ b/src/core/hle/service/audio/hardware_opus_decoder.h
@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/opus/decoder.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+class IHardwareOpusDecoder final : public ServiceFramework<IHardwareOpusDecoder> {
+public:
+    explicit IHardwareOpusDecoder(Core::System& system_,
+                                  AudioCore::OpusDecoder::HardwareOpus& hardware_opus);
+    ~IHardwareOpusDecoder() override;
+    Result Initialize(const AudioCore::OpusDecoder::OpusParametersEx& params,
+                      Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size);
+    Result Initialize(const AudioCore::OpusDecoder::OpusMultiStreamParametersEx& params,
+                      Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size);
+private:
+    Result DecodeInterleavedOld(OutBuffer<BufferAttr_HipcMapAlias> out_pcm_data,
+                                Out<u32> out_data_size, Out<u32> out_sample_count,
+                                InBuffer<BufferAttr_HipcMapAlias> opus_data);
+    Result SetContext(InBuffer<BufferAttr_HipcMapAlias> decoder_context);
+    Result DecodeInterleavedForMultiStreamOld(OutBuffer<BufferAttr_HipcMapAlias> out_pcm_data,
+                                              Out<u32> out_data_size, Out<u32> out_sample_count,
+                                              InBuffer<BufferAttr_HipcMapAlias> opus_data);
+    Result SetContextForMultiStream(InBuffer<BufferAttr_HipcMapAlias> decoder_context);
+    Result DecodeInterleavedWithPerfOld(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias> opus_data);
+    Result DecodeInterleavedForMultiStreamWithPerfOld(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias> opus_data);
+    Result DecodeInterleavedWithPerfAndResetOld(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias> opus_data, bool reset);
+    Result DecodeInterleavedForMultiStreamWithPerfAndResetOld(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias> opus_data, bool reset);
+    Result DecodeInterleaved(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> opus_data,
+        bool reset);
+    Result DecodeInterleavedForMultiStream(
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_pcm_data,
+        Out<u32> out_data_size, Out<u32> out_sample_count, Out<u64> out_time_taken,
+        InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> opus_data,
+        bool reset);
+    std::unique_ptr<AudioCore::OpusDecoder::OpusDecoder> impl;
+    Common::ScratchBuffer<u8> output_data;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hardware_opus_decoder_manager.cpp b/src/core/hle/service/audio/hardware_opus_decoder_manager.cpp
new file mode 100644
index 000000000..9de72e30f
--- /dev/null
+++ b/src/core/hle/service/audio/hardware_opus_decoder_manager.cpp
@@ -0,0 +1,156 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/audio/hardware_opus_decoder.h"
+#include "core/hle/service/audio/hardware_opus_decoder_manager.h"
+#include "core/hle/service/cmif_serialization.h"
+namespace Service::Audio {
+using namespace AudioCore::OpusDecoder;
+IHardwareOpusDecoderManager::IHardwareOpusDecoderManager(Core::System& system_)
+    : ServiceFramework{system_, "hwopus"}, system{system_}, impl{system} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IHardwareOpusDecoderManager::OpenHardwareOpusDecoder>, "OpenHardwareOpusDecoder"},
+        {1, D<&IHardwareOpusDecoderManager::GetWorkBufferSize>, "GetWorkBufferSize"},
+        {2, D<&IHardwareOpusDecoderManager::OpenHardwareOpusDecoderForMultiStream>, "OpenOpusDecoderForMultiStream"},
+        {3, D<&IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStream>, "GetWorkBufferSizeForMultiStream"},
+        {4, D<&IHardwareOpusDecoderManager::OpenHardwareOpusDecoderEx>, "OpenHardwareOpusDecoderEx"},
+        {5, D<&IHardwareOpusDecoderManager::GetWorkBufferSizeEx>, "GetWorkBufferSizeEx"},
+        {6, D<&IHardwareOpusDecoderManager::OpenHardwareOpusDecoderForMultiStreamEx>, "OpenHardwareOpusDecoderForMultiStreamEx"},
+        {7, D<&IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStreamEx>, "GetWorkBufferSizeForMultiStreamEx"},
+        {8, D<&IHardwareOpusDecoderManager::GetWorkBufferSizeExEx>, "GetWorkBufferSizeExEx"},
+        {9, D<&IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStreamExEx>, "GetWorkBufferSizeForMultiStreamExEx"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IHardwareOpusDecoderManager::~IHardwareOpusDecoderManager() = default;
+Result IHardwareOpusDecoderManager::OpenHardwareOpusDecoder(
+    Out<SharedPointer<IHardwareOpusDecoder>> out_decoder, OpusParameters params, u32 tmem_size,
+    InCopyHandle<Kernel::KTransferMemory> tmem_handle) {
+    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} transfer_memory_size {:#x}",
+              params.sample_rate, params.channel_count, tmem_size);
+    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
+    OpusParametersEx ex{
+        .sample_rate = params.sample_rate,
+        .channel_count = params.channel_count,
+        .use_large_frame_size = false,
+    };
+    R_TRY(decoder->Initialize(ex, tmem_handle.Get(), tmem_size));
+    *out_decoder = decoder;
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSize(Out<u32> out_size, OpusParameters params) {
+    R_TRY(impl.GetWorkBufferSize(params, *out_size));
+    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} -- returned size {:#x}",
+              params.sample_rate, params.channel_count, *out_size);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::OpenHardwareOpusDecoderForMultiStream(
+    Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+    InLargeData<OpusMultiStreamParameters, BufferAttr_HipcPointer> params, u32 tmem_size,
+    InCopyHandle<Kernel::KTransferMemory> tmem_handle) {
+    LOG_DEBUG(Service_Audio,
+              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
+              "transfer_memory_size {:#x}",
+              params->sample_rate, params->channel_count, params->total_stream_count,
+              params->stereo_stream_count, tmem_size);
+    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
+    OpusMultiStreamParametersEx ex{
+        .sample_rate = params->sample_rate,
+        .channel_count = params->channel_count,
+        .total_stream_count = params->total_stream_count,
+        .stereo_stream_count = params->stereo_stream_count,
+        .use_large_frame_size = false,
+        .mappings{},
+    };
+    std::memcpy(ex.mappings.data(), params->mappings.data(), sizeof(params->mappings));
+    R_TRY(decoder->Initialize(ex, tmem_handle.Get(), tmem_size));
+    *out_decoder = decoder;
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStream(
+    Out<u32> out_size, InLargeData<OpusMultiStreamParameters, BufferAttr_HipcPointer> params) {
+    R_TRY(impl.GetWorkBufferSizeForMultiStream(*params, *out_size));
+    LOG_DEBUG(Service_Audio, "size {:#x}", *out_size);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::OpenHardwareOpusDecoderEx(
+    Out<SharedPointer<IHardwareOpusDecoder>> out_decoder, OpusParametersEx params, u32 tmem_size,
+    InCopyHandle<Kernel::KTransferMemory> tmem_handle) {
+    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} transfer_memory_size {:#x}",
+              params.sample_rate, params.channel_count, tmem_size);
+    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
+    R_TRY(decoder->Initialize(params, tmem_handle.Get(), tmem_size));
+    *out_decoder = decoder;
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSizeEx(Out<u32> out_size,
+                                                        OpusParametersEx params) {
+    R_TRY(impl.GetWorkBufferSizeEx(params, *out_size));
+    LOG_DEBUG(Service_Audio, "size {:#x}", *out_size);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::OpenHardwareOpusDecoderForMultiStreamEx(
+    Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+    InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params, u32 tmem_size,
+    InCopyHandle<Kernel::KTransferMemory> tmem_handle) {
+    LOG_DEBUG(Service_Audio,
+              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
+              "use_large_frame_size {}"
+              "transfer_memory_size {:#x}",
+              params->sample_rate, params->channel_count, params->total_stream_count,
+              params->stereo_stream_count, params->use_large_frame_size, tmem_size);
+    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
+    R_TRY(decoder->Initialize(*params, tmem_handle.Get(), tmem_size));
+    *out_decoder = decoder;
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStreamEx(
+    Out<u32> out_size, InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params) {
+    R_TRY(impl.GetWorkBufferSizeForMultiStreamEx(*params, *out_size));
+    LOG_DEBUG(Service_Audio,
+              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
+              "use_large_frame_size {} -- returned size {:#x}",
+              params->sample_rate, params->channel_count, params->total_stream_count,
+              params->stereo_stream_count, params->use_large_frame_size, *out_size);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSizeExEx(Out<u32> out_size,
+                                                          OpusParametersEx params) {
+    R_TRY(impl.GetWorkBufferSizeExEx(params, *out_size));
+    LOG_DEBUG(Service_Audio, "size {:#x}", *out_size);
+    R_SUCCEED();
+}
+Result IHardwareOpusDecoderManager::GetWorkBufferSizeForMultiStreamExEx(
+    Out<u32> out_size, InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params) {
+    R_TRY(impl.GetWorkBufferSizeForMultiStreamExEx(*params, *out_size));
+    LOG_DEBUG(Service_Audio, "size {:#x}", *out_size);
+    R_SUCCEED();
+}
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hardware_opus_decoder_manager.h b/src/core/hle/service/audio/hardware_opus_decoder_manager.h
new file mode 100644
index 000000000..4f869c517
--- /dev/null
+++ b/src/core/hle/service/audio/hardware_opus_decoder_manager.h
@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "audio_core/opus/decoder_manager.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::Audio {
+class IHardwareOpusDecoder;
+using AudioCore::OpusDecoder::OpusMultiStreamParameters;
+using AudioCore::OpusDecoder::OpusMultiStreamParametersEx;
+using AudioCore::OpusDecoder::OpusParameters;
+using AudioCore::OpusDecoder::OpusParametersEx;
+class IHardwareOpusDecoderManager final : public ServiceFramework<IHardwareOpusDecoderManager> {
+public:
+    explicit IHardwareOpusDecoderManager(Core::System& system_);
+    ~IHardwareOpusDecoderManager() override;
+private:
+    Result OpenHardwareOpusDecoder(Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+                                   OpusParameters params, u32 tmem_size,
+                                   InCopyHandle<Kernel::KTransferMemory> tmem_handle);
+    Result GetWorkBufferSize(Out<u32> out_size, OpusParameters params);
+    Result OpenHardwareOpusDecoderForMultiStream(
+        Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+        InLargeData<OpusMultiStreamParameters, BufferAttr_HipcPointer> params, u32 tmem_size,
+        InCopyHandle<Kernel::KTransferMemory> tmem_handle);
+    Result GetWorkBufferSizeForMultiStream(
+        Out<u32> out_size, InLargeData<OpusMultiStreamParameters, BufferAttr_HipcPointer> params);
+    Result OpenHardwareOpusDecoderEx(Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+                                     OpusParametersEx params, u32 tmem_size,
+                                     InCopyHandle<Kernel::KTransferMemory> tmem_handle);
+    Result GetWorkBufferSizeEx(Out<u32> out_size, OpusParametersEx params);
+    Result OpenHardwareOpusDecoderForMultiStreamEx(
+        Out<SharedPointer<IHardwareOpusDecoder>> out_decoder,
+        InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params, u32 tmem_size,
+        InCopyHandle<Kernel::KTransferMemory> tmem_handle);
+    Result GetWorkBufferSizeForMultiStreamEx(
+        Out<u32> out_size, InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params);
+    Result GetWorkBufferSizeExEx(Out<u32> out_size, OpusParametersEx params);
+    Result GetWorkBufferSizeForMultiStreamExEx(
+        Out<u32> out_size, InLargeData<OpusMultiStreamParametersEx, BufferAttr_HipcPointer> params);
+    Core::System& system;
+    AudioCore::OpusDecoder::OpusDecoderManager impl;
+};
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hwopus.cpp b/src/core/hle/service/audio/hwopus.cpp
deleted file mode 100644
index 91f33aabd..000000000
--- a/src/core/hle/service/audio/hwopus.cpp
+++ /dev/null
@@ -1,502 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#include <memory>
-#include <vector>
-#include "audio_core/opus/decoder.h"
-#include "audio_core/opus/parameters.h"
-#include "common/assert.h"
-#include "common/logging/log.h"
-#include "common/scratch_buffer.h"
-#include "core/core.h"
-#include "core/hle/service/audio/hwopus.h"
-#include "core/hle/service/ipc_helpers.h"
-namespace Service::Audio {
-using namespace AudioCore::OpusDecoder;
-class IHardwareOpusDecoder final : public ServiceFramework<IHardwareOpusDecoder> {
-public:
-    explicit IHardwareOpusDecoder(Core::System& system_, HardwareOpus& hardware_opus)
-        : ServiceFramework{system_, "IHardwareOpusDecoder"},
-          impl{std::make_unique<AudioCore::OpusDecoder::OpusDecoder>(system_, hardware_opus)} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, &IHardwareOpusDecoder::DecodeInterleavedOld, "DecodeInterleavedOld"},
-            {1, &IHardwareOpusDecoder::SetContext, "SetContext"},
-            {2, &IHardwareOpusDecoder::DecodeInterleavedForMultiStreamOld, "DecodeInterleavedForMultiStreamOld"},
-            {3, &IHardwareOpusDecoder::SetContextForMultiStream, "SetContextForMultiStream"},
-            {4, &IHardwareOpusDecoder::DecodeInterleavedWithPerfOld, "DecodeInterleavedWithPerfOld"},
-            {5, &IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfOld, "DecodeInterleavedForMultiStreamWithPerfOld"},
-            {6, &IHardwareOpusDecoder::DecodeInterleavedWithPerfAndResetOld, "DecodeInterleavedWithPerfAndResetOld"},
-            {7, &IHardwareOpusDecoder::DecodeInterleavedForMultiStreamWithPerfAndResetOld, "DecodeInterleavedForMultiStreamWithPerfAndResetOld"},
-            {8, &IHardwareOpusDecoder::DecodeInterleaved, "DecodeInterleaved"},
-            {9, &IHardwareOpusDecoder::DecodeInterleavedForMultiStream, "DecodeInterleavedForMultiStream"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-    }
-    Result Initialize(OpusParametersEx& params, Kernel::KTransferMemory* transfer_memory,
-                      u64 transfer_memory_size) {
-        return impl->Initialize(params, transfer_memory, transfer_memory_size);
-    }
-    Result Initialize(OpusMultiStreamParametersEx& params, Kernel::KTransferMemory* transfer_memory,
-                      u64 transfer_memory_size) {
-        return impl->Initialize(params, transfer_memory, transfer_memory_size);
-    }
-private:
-    void DecodeInterleavedOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        auto result =
-            impl->DecodeInterleaved(&size, nullptr, &sample_count, input_data, output_data, false);
-        LOG_DEBUG(Service_Audio, "bytes read 0x{:X} samples generated {}", size, sample_count);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 4};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-    }
-    void SetContext(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        LOG_DEBUG(Service_Audio, "called");
-        auto input_data{ctx.ReadBuffer(0)};
-        auto result = impl->SetContext(input_data);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void DecodeInterleavedForMultiStreamOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        auto result = impl->DecodeInterleavedForMultiStream(&size, nullptr, &sample_count,
-                                                            input_data, output_data, false);
-        LOG_DEBUG(Service_Audio, "bytes read 0x{:X} samples generated {}", size, sample_count);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 4};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-    }
-    void SetContextForMultiStream(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        LOG_DEBUG(Service_Audio, "called");
-        auto input_data{ctx.ReadBuffer(0)};
-        auto result = impl->SetContext(input_data);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-    }
-    void DecodeInterleavedWithPerfOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleaved(&size, &time_taken, &sample_count, input_data,
-                                              output_data, false);
-        LOG_DEBUG(Service_Audio, "bytes read 0x{:X} samples generated {} time taken {}", size,
-                  sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    void DecodeInterleavedForMultiStreamWithPerfOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleavedForMultiStream(&size, &time_taken, &sample_count,
-                                                            input_data, output_data, false);
-        LOG_DEBUG(Service_Audio, "bytes read 0x{:X} samples generated {} time taken {}", size,
-                  sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    void DecodeInterleavedWithPerfAndResetOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto reset{rp.Pop<bool>()};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleaved(&size, &time_taken, &sample_count, input_data,
-                                              output_data, reset);
-        LOG_DEBUG(Service_Audio, "reset {} bytes read 0x{:X} samples generated {} time taken {}",
-                  reset, size, sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    void DecodeInterleavedForMultiStreamWithPerfAndResetOld(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto reset{rp.Pop<bool>()};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleavedForMultiStream(&size, &time_taken, &sample_count,
-                                                            input_data, output_data, reset);
-        LOG_DEBUG(Service_Audio, "reset {} bytes read 0x{:X} samples generated {} time taken {}",
-                  reset, size, sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    void DecodeInterleaved(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto reset{rp.Pop<bool>()};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleaved(&size, &time_taken, &sample_count, input_data,
-                                              output_data, reset);
-        LOG_DEBUG(Service_Audio, "reset {} bytes read 0x{:X} samples generated {} time taken {}",
-                  reset, size, sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    void DecodeInterleavedForMultiStream(HLERequestContext& ctx) {
-        IPC::RequestParser rp{ctx};
-        auto reset{rp.Pop<bool>()};
-        auto input_data{ctx.ReadBuffer(0)};
-        output_data.resize_destructive(ctx.GetWriteBufferSize());
-        u32 size{};
-        u32 sample_count{};
-        u64 time_taken{};
-        auto result = impl->DecodeInterleavedForMultiStream(&size, &time_taken, &sample_count,
-                                                            input_data, output_data, reset);
-        LOG_DEBUG(Service_Audio, "reset {} bytes read 0x{:X} samples generated {} time taken {}",
-                  reset, size, sample_count, time_taken);
-        ctx.WriteBuffer(output_data);
-        IPC::ResponseBuilder rb{ctx, 6};
-        rb.Push(result);
-        rb.Push(size);
-        rb.Push(sample_count);
-        rb.Push(time_taken);
-    }
-    std::unique_ptr<AudioCore::OpusDecoder::OpusDecoder> impl;
-    Common::ScratchBuffer<u8> output_data;
-};
-void HwOpus::OpenHardwareOpusDecoder(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<OpusParameters>();
-    auto transfer_memory_size{rp.Pop<u32>()};
-    auto transfer_memory_handle{ctx.GetCopyHandle(0)};
-    auto transfer_memory{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(transfer_memory_handle)};
-    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} transfer_memory_size 0x{:X}",
-              params.sample_rate, params.channel_count, transfer_memory_size);
-    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
-    OpusParametersEx ex{
-        .sample_rate = params.sample_rate,
-        .channel_count = params.channel_count,
-        .use_large_frame_size = false,
-    };
-    auto result = decoder->Initialize(ex, transfer_memory.GetPointerUnsafe(), transfer_memory_size);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(result);
-    rb.PushIpcInterface(decoder);
-}
-void HwOpus::GetWorkBufferSize(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<OpusParameters>();
-    u64 size{};
-    auto result = impl.GetWorkBufferSize(params, size);
-    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} -- returned size 0x{:X}",
-              params.sample_rate, params.channel_count, size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-void HwOpus::OpenHardwareOpusDecoderForMultiStream(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto input{ctx.ReadBuffer()};
-    OpusMultiStreamParameters params;
-    std::memcpy(&params, input.data(), sizeof(OpusMultiStreamParameters));
-    auto transfer_memory_size{rp.Pop<u32>()};
-    auto transfer_memory_handle{ctx.GetCopyHandle(0)};
-    auto transfer_memory{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(transfer_memory_handle)};
-    LOG_DEBUG(Service_Audio,
-              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
-              "transfer_memory_size 0x{:X}",
-              params.sample_rate, params.channel_count, params.total_stream_count,
-              params.stereo_stream_count, transfer_memory_size);
-    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
-    OpusMultiStreamParametersEx ex{
-        .sample_rate = params.sample_rate,
-        .channel_count = params.channel_count,
-        .total_stream_count = params.total_stream_count,
-        .stereo_stream_count = params.stereo_stream_count,
-        .use_large_frame_size = false,
-        .mappings{},
-    };
-    std::memcpy(ex.mappings.data(), params.mappings.data(), sizeof(params.mappings));
-    auto result = decoder->Initialize(ex, transfer_memory.GetPointerUnsafe(), transfer_memory_size);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(result);
-    rb.PushIpcInterface(decoder);
-}
-void HwOpus::GetWorkBufferSizeForMultiStream(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto input{ctx.ReadBuffer()};
-    OpusMultiStreamParameters params;
-    std::memcpy(&params, input.data(), sizeof(OpusMultiStreamParameters));
-    u64 size{};
-    auto result = impl.GetWorkBufferSizeForMultiStream(params, size);
-    LOG_DEBUG(Service_Audio, "size 0x{:X}", size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-void HwOpus::OpenHardwareOpusDecoderEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<OpusParametersEx>();
-    auto transfer_memory_size{rp.Pop<u32>()};
-    auto transfer_memory_handle{ctx.GetCopyHandle(0)};
-    auto transfer_memory{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(transfer_memory_handle)};
-    LOG_DEBUG(Service_Audio, "sample_rate {} channel_count {} transfer_memory_size 0x{:X}",
-              params.sample_rate, params.channel_count, transfer_memory_size);
-    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
-    auto result =
-        decoder->Initialize(params, transfer_memory.GetPointerUnsafe(), transfer_memory_size);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(result);
-    rb.PushIpcInterface(decoder);
-}
-void HwOpus::GetWorkBufferSizeEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<OpusParametersEx>();
-    u64 size{};
-    auto result = impl.GetWorkBufferSizeEx(params, size);
-    LOG_DEBUG(Service_Audio, "size 0x{:X}", size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-void HwOpus::OpenHardwareOpusDecoderForMultiStreamEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto input{ctx.ReadBuffer()};
-    OpusMultiStreamParametersEx params;
-    std::memcpy(&params, input.data(), sizeof(OpusMultiStreamParametersEx));
-    auto transfer_memory_size{rp.Pop<u32>()};
-    auto transfer_memory_handle{ctx.GetCopyHandle(0)};
-    auto transfer_memory{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(transfer_memory_handle)};
-    LOG_DEBUG(Service_Audio,
-              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
-              "use_large_frame_size {}"
-              "transfer_memory_size 0x{:X}",
-              params.sample_rate, params.channel_count, params.total_stream_count,
-              params.stereo_stream_count, params.use_large_frame_size, transfer_memory_size);
-    auto decoder{std::make_shared<IHardwareOpusDecoder>(system, impl.GetHardwareOpus())};
-    auto result =
-        decoder->Initialize(params, transfer_memory.GetPointerUnsafe(), transfer_memory_size);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(result);
-    rb.PushIpcInterface(decoder);
-}
-void HwOpus::GetWorkBufferSizeForMultiStreamEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto input{ctx.ReadBuffer()};
-    OpusMultiStreamParametersEx params;
-    std::memcpy(&params, input.data(), sizeof(OpusMultiStreamParametersEx));
-    u64 size{};
-    auto result = impl.GetWorkBufferSizeForMultiStreamEx(params, size);
-    LOG_DEBUG(Service_Audio,
-              "sample_rate {} channel_count {} total_stream_count {} stereo_stream_count {} "
-              "use_large_frame_size {} -- returned size 0x{:X}",
-              params.sample_rate, params.channel_count, params.total_stream_count,
-              params.stereo_stream_count, params.use_large_frame_size, size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-void HwOpus::GetWorkBufferSizeExEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<OpusParametersEx>();
-    u64 size{};
-    auto result = impl.GetWorkBufferSizeExEx(params, size);
-    LOG_DEBUG(Service_Audio, "size 0x{:X}", size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-void HwOpus::GetWorkBufferSizeForMultiStreamExEx(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    auto input{ctx.ReadBuffer()};
-    OpusMultiStreamParametersEx params;
-    std::memcpy(&params, input.data(), sizeof(OpusMultiStreamParametersEx));
-    u64 size{};
-    auto result = impl.GetWorkBufferSizeForMultiStreamExEx(params, size);
-    LOG_DEBUG(Service_Audio, "size 0x{:X}", size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(result);
-    rb.Push(size);
-}
-HwOpus::HwOpus(Core::System& system_)
-    : ServiceFramework{system_, "hwopus"}, system{system_}, impl{system} {
-    static const FunctionInfo functions[] = {
-        {0, &HwOpus::OpenHardwareOpusDecoder, "OpenHardwareOpusDecoder"},
-        {1, &HwOpus::GetWorkBufferSize, "GetWorkBufferSize"},
-        {2, &HwOpus::OpenHardwareOpusDecoderForMultiStream, "OpenOpusDecoderForMultiStream"},
-        {3, &HwOpus::GetWorkBufferSizeForMultiStream, "GetWorkBufferSizeForMultiStream"},
-        {4, &HwOpus::OpenHardwareOpusDecoderEx, "OpenHardwareOpusDecoderEx"},
-        {5, &HwOpus::GetWorkBufferSizeEx, "GetWorkBufferSizeEx"},
-        {6, &HwOpus::OpenHardwareOpusDecoderForMultiStreamEx,
-         "OpenHardwareOpusDecoderForMultiStreamEx"},
-        {7, &HwOpus::GetWorkBufferSizeForMultiStreamEx, "GetWorkBufferSizeForMultiStreamEx"},
-        {8, &HwOpus::GetWorkBufferSizeExEx, "GetWorkBufferSizeExEx"},
-        {9, &HwOpus::GetWorkBufferSizeForMultiStreamExEx, "GetWorkBufferSizeForMultiStreamExEx"},
-    };
-    RegisterHandlers(functions);
-}
-HwOpus::~HwOpus() = default;
-} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/hwopus.h b/src/core/hle/service/audio/hwopus.h
deleted file mode 100644
index d3960065e..000000000
--- a/src/core/hle/service/audio/hwopus.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-#pragma once
-#include "audio_core/opus/decoder_manager.h"
-#include "core/hle/service/service.h"
-namespace Core {
-class System;
-}
-namespace Service::Audio {
-class HwOpus final : public ServiceFramework<HwOpus> {
-public:
-    explicit HwOpus(Core::System& system_);
-    ~HwOpus() override;
-private:
-    void OpenHardwareOpusDecoder(HLERequestContext& ctx);
-    void GetWorkBufferSize(HLERequestContext& ctx);
-    void OpenHardwareOpusDecoderForMultiStream(HLERequestContext& ctx);
-    void GetWorkBufferSizeForMultiStream(HLERequestContext& ctx);
-    void OpenHardwareOpusDecoderEx(HLERequestContext& ctx);
-    void GetWorkBufferSizeEx(HLERequestContext& ctx);
-    void OpenHardwareOpusDecoderForMultiStreamEx(HLERequestContext& ctx);
-    void GetWorkBufferSizeForMultiStreamEx(HLERequestContext& ctx);
-    void GetWorkBufferSizeExEx(HLERequestContext& ctx);
-    void GetWorkBufferSizeForMultiStreamExEx(HLERequestContext& ctx);
-    Core::System& system;
-    AudioCore::OpusDecoder::OpusDecoderManager impl;
-};
-} // namespace Service::Audio
diff --git a/src/core/hle/service/cmif_serialization.h b/src/core/hle/service/cmif_serialization.h
index f24682c34..5a5f610f3 100644
--- a/src/core/hle/service/cmif_serialization.h
+++ b/src/core/hle/service/cmif_serialization.h
@@ -415,7 +415,7 @@ void WriteOutArgument(bool is_domain, CallArguments& args, u8* raw_data, HLERequ
            auto& buffer = temp[OutBufferIndex];
            const size_t size = buffer.size();
-            if (ctx.CanWriteBuffer(OutBufferIndex)) {
+            if (size > 0 && ctx.CanWriteBuffer(OutBufferIndex)) {
                if constexpr (ArgType::Attr & BufferAttr_HipcAutoSelect) {
                    ctx.WriteBuffer(buffer.data(), size, OutBufferIndex);
                } else if constexpr (ArgType::Attr & BufferAttr_HipcMapAlias) {
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp b/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
index 39690018b..8483394d0 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
+++ b/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
@@ -3,82 +3,34 @@
 #include "core/file_sys/fs_filesystem.h"
 #include "core/file_sys/savedata_factory.h"
+#include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/fsp/fs_i_directory.h"
-#include "core/hle/service/ipc_helpers.h"
 namespace Service::FileSystem {
-template <typename T>
+IDirectory::IDirectory(Core::System& system_, FileSys::VirtualDir directory_,
-static void BuildEntryIndex(std::vector<FileSys::DirectoryEntry>& entries,
-                            const std::vector<T>& new_data, FileSys::DirectoryEntryType type) {
-    entries.reserve(entries.size() + new_data.size());
-    for (const auto& new_entry : new_data) {
-        auto name = new_entry->GetName();
-        if (type == FileSys::DirectoryEntryType::File &&
-            name == FileSys::GetSaveDataSizeFileName()) {
-            continue;
-        }
-        entries.emplace_back(name, static_cast<s8>(type),
-                             type == FileSys::DirectoryEntryType::Directory ? 0
-                                                                            : new_entry->GetSize());
-    }
-}
-IDirectory::IDirectory(Core::System& system_, FileSys::VirtualDir backend_,
                       FileSys::OpenDirectoryMode mode)
-    : ServiceFramework{system_, "IDirectory"}, backend(std::move(backend_)) {
+    : ServiceFramework{system_, "IDirectory"},
+      backend(std::make_unique<FileSys::Fsa::IDirectory>(directory_, mode)) {
    static const FunctionInfo functions[] = {
-        {0, &IDirectory::Read, "Read"},
+        {0, D<&IDirectory::Read>, "Read"},
-        {1, &IDirectory::GetEntryCount, "GetEntryCount"},
+        {1, D<&IDirectory::GetEntryCount>, "GetEntryCount"},
    };
    RegisterHandlers(functions);
-    // TODO(DarkLordZach): Verify that this is the correct behavior.
-    // Build entry index now to save time later.
-    if (True(mode & FileSys::OpenDirectoryMode::Directory)) {
-        BuildEntryIndex(entries, backend->GetSubdirectories(),
-                        FileSys::DirectoryEntryType::Directory);
-    }
-    if (True(mode & FileSys::OpenDirectoryMode::File)) {
-        BuildEntryIndex(entries, backend->GetFiles(), FileSys::DirectoryEntryType::File);
-    }
 }
-void IDirectory::Read(HLERequestContext& ctx) {
+Result IDirectory::Read(
+    Out<s64> out_count,
+    const OutArray<FileSys::DirectoryEntry, BufferAttr_HipcMapAlias> out_entries) {
    LOG_DEBUG(Service_FS, "called.");
-    // Calculate how many entries we can fit in the output buffer
+    R_RETURN(backend->Read(out_count, out_entries.data(), out_entries.size()));
-    const u64 count_entries = ctx.GetWriteBufferNumElements<FileSys::DirectoryEntry>();
-    // Cap at total number of entries.
-    const u64 actual_entries = std::min(count_entries, entries.size() - next_entry_index);
-    // Determine data start and end
-    const auto* begin = reinterpret_cast<u8*>(entries.data() + next_entry_index);
-    const auto* end = reinterpret_cast<u8*>(entries.data() + next_entry_index + actual_entries);
-    const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
-    next_entry_index += actual_entries;
-    // Write the data to memory
-    ctx.WriteBuffer(begin, range_size);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(ResultSuccess);
-    rb.Push(actual_entries);
 }
-void IDirectory::GetEntryCount(HLERequestContext& ctx) {
+Result IDirectory::GetEntryCount(Out<s64> out_count) {
    LOG_DEBUG(Service_FS, "called");
-    u64 count = entries.size() - next_entry_index;
+    R_RETURN(backend->GetEntryCount(out_count));
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(ResultSuccess);
-    rb.Push(count);
 }
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_directory.h b/src/core/hle/service/filesystem/fsp/fs_i_directory.h
index 793ecfcd7..b6251f7fd 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_directory.h
+++ b/src/core/hle/service/filesystem/fsp/fs_i_directory.h
@@ -3,7 +3,9 @@
 #pragma once
+#include "core/file_sys/fsa/fs_i_directory.h"
 #include "core/file_sys/vfs/vfs.h"
+#include "core/hle/service/cmif_types.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/service.h"
@@ -15,16 +17,15 @@ namespace Service::FileSystem {
 class IDirectory final : public ServiceFramework<IDirectory> {
 public:
-    explicit IDirectory(Core::System& system_, FileSys::VirtualDir backend_,
+    explicit IDirectory(Core::System& system_, FileSys::VirtualDir directory_,
                        FileSys::OpenDirectoryMode mode);
 private:
-    FileSys::VirtualDir backend;
+    std::unique_ptr<FileSys::Fsa::IDirectory> backend;
-    std::vector<FileSys::DirectoryEntry> entries;
-    u64 next_entry_index = 0;
-    void Read(HLERequestContext& ctx);
+    Result Read(Out<s64> out_count,
-    void GetEntryCount(HLERequestContext& ctx);
+                const OutArray<FileSys::DirectoryEntry, BufferAttr_HipcMapAlias> out_entries);
+    Result GetEntryCount(Out<s64> out_count);
 };
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_file.cpp b/src/core/hle/service/filesystem/fsp/fs_i_file.cpp
index 9a18f6ec5..a355d46ae 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_file.cpp
+++ b/src/core/hle/service/filesystem/fsp/fs_i_file.cpp
@@ -2,126 +2,64 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "core/file_sys/errors.h"
+#include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/fsp/fs_i_file.h"
-#include "core/hle/service/ipc_helpers.h"
 namespace Service::FileSystem {
-IFile::IFile(Core::System& system_, FileSys::VirtualFile backend_)
+IFile::IFile(Core::System& system_, FileSys::VirtualFile file_)
-    : ServiceFramework{system_, "IFile"}, backend(std::move(backend_)) {
+    : ServiceFramework{system_, "IFile"}, backend{std::make_unique<FileSys::Fsa::IFile>(file_)} {
+    // clang-format off
    static const FunctionInfo functions[] = {
-        {0, &IFile::Read, "Read"},
+        {0, D<&IFile::Read>, "Read"},
-        {1, &IFile::Write, "Write"},
+        {1, D<&IFile::Write>, "Write"},
-        {2, &IFile::Flush, "Flush"},
+        {2, D<&IFile::Flush>, "Flush"},
-        {3, &IFile::SetSize, "SetSize"},
+        {3, D<&IFile::SetSize>, "SetSize"},
-        {4, &IFile::GetSize, "GetSize"},
+        {4, D<&IFile::GetSize>, "GetSize"},
        {5, nullptr, "OperateRange"},
        {6, nullptr, "OperateRangeWithBuffer"},
    };
+    // clang-format on
    RegisterHandlers(functions);
 }
-void IFile::Read(HLERequestContext& ctx) {
+Result IFile::Read(
-    IPC::RequestParser rp{ctx};
+    FileSys::ReadOption option, Out<s64> out_size, s64 offset,
-    const u64 option = rp.Pop<u64>();
+    const OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_buffer,
-    const s64 offset = rp.Pop<s64>();
+    s64 size) {
-    const s64 length = rp.Pop<s64>();
+    LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option.value, offset,
+              size);
-    LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option, offset, length);
-    // Error checking
-    if (length < 0) {
-        LOG_ERROR(Service_FS, "Length is less than 0, length={}", length);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidSize);
-        return;
-    }
-    if (offset < 0) {
-        LOG_ERROR(Service_FS, "Offset is less than 0, offset={}", offset);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidOffset);
-        return;
-    }
    // Read the data from the Storage backend
-    std::vector<u8> output = backend->ReadBytes(length, offset);
+    R_RETURN(
+        backend->Read(reinterpret_cast<size_t*>(out_size.Get()), offset, out_buffer.data(), size));
-    // Write the data to memory
-    ctx.WriteBuffer(output);
-    IPC::ResponseBuilder rb{ctx, 4};
-    rb.Push(ResultSuccess);
-    rb.Push(static_cast<u64>(output.size()));
 }
-void IFile::Write(HLERequestContext& ctx) {
+Result IFile::Write(
-    IPC::RequestParser rp{ctx};
+    const InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> buffer,
-    const u64 option = rp.Pop<u64>();
+    FileSys::WriteOption option, s64 offset, s64 size) {
-    const s64 offset = rp.Pop<s64>();
+    LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option.value, offset,
-    const s64 length = rp.Pop<s64>();
+              size);
-    LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option, offset, length);
-    // Error checking
-    if (length < 0) {
-        LOG_ERROR(Service_FS, "Length is less than 0, length={}", length);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidSize);
-        return;
-    }
-    if (offset < 0) {
-        LOG_ERROR(Service_FS, "Offset is less than 0, offset={}", offset);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidOffset);
-        return;
-    }
-    const auto data = ctx.ReadBuffer();
-    ASSERT_MSG(static_cast<s64>(data.size()) <= length,
+    R_RETURN(backend->Write(offset, buffer.data(), size, option));
-               "Attempting to write more data than requested (requested={:016X}, actual={:016X}).",
-               length, data.size());
-    // Write the data to the Storage backend
-    const auto write_size =
-        static_cast<std::size_t>(std::distance(data.begin(), data.begin() + length));
-    const std::size_t written = backend->Write(data.data(), write_size, offset);
-    ASSERT_MSG(static_cast<s64>(written) == length,
-               "Could not write all bytes to file (requested={:016X}, actual={:016X}).", length,
-               written);
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(ResultSuccess);
 }
-void IFile::Flush(HLERequestContext& ctx) {
+Result IFile::Flush() {
    LOG_DEBUG(Service_FS, "called");
-    // Exists for SDK compatibiltity -- No need to flush file.
+    R_RETURN(backend->Flush());
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(ResultSuccess);
 }
-void IFile::SetSize(HLERequestContext& ctx) {
+Result IFile::SetSize(s64 size) {
-    IPC::RequestParser rp{ctx};
-    const u64 size = rp.Pop<u64>();
    LOG_DEBUG(Service_FS, "called, size={}", size);
-    backend->Resize(size);
+    R_RETURN(backend->SetSize(size));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(ResultSuccess);
 }
-void IFile::GetSize(HLERequestContext& ctx) {
+Result IFile::GetSize(Out<s64> out_size) {
-    const u64 size = backend->GetSize();
+    LOG_DEBUG(Service_FS, "called");
-    LOG_DEBUG(Service_FS, "called, size={}", size);
-    IPC::ResponseBuilder rb{ctx, 4};
+    R_RETURN(backend->GetSize(out_size));
-    rb.Push(ResultSuccess);
-    rb.Push<u64>(size);
 }
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_file.h b/src/core/hle/service/filesystem/fsp/fs_i_file.h
index 5e5430c67..e8599ee2f 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_file.h
+++ b/src/core/hle/service/filesystem/fsp/fs_i_file.h
@@ -3,6 +3,8 @@
 #pragma once
+#include "core/file_sys/fsa/fs_i_file.h"
+#include "core/hle/service/cmif_types.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/service.h"
@@ -10,16 +12,21 @@ namespace Service::FileSystem {
 class IFile final : public ServiceFramework<IFile> {
 public:
-    explicit IFile(Core::System& system_, FileSys::VirtualFile backend_);
+    explicit IFile(Core::System& system_, FileSys::VirtualFile file_);
 private:
-    FileSys::VirtualFile backend;
+    std::unique_ptr<FileSys::Fsa::IFile> backend;
-    void Read(HLERequestContext& ctx);
+    Result Read(FileSys::ReadOption option, Out<s64> out_size, s64 offset,
-    void Write(HLERequestContext& ctx);
+                const OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure>
-    void Flush(HLERequestContext& ctx);
+                    out_buffer,
-    void SetSize(HLERequestContext& ctx);
+                s64 size);
-    void GetSize(HLERequestContext& ctx);
+    Result Write(
+        const InBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> buffer,
+        FileSys::WriteOption option, s64 offset, s64 size);
+    Result Flush();
+    Result SetSize(s64 size);
+    Result GetSize(Out<s64> out_size);
 };
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_filesystem.cpp b/src/core/hle/service/filesystem/fsp/fs_i_filesystem.cpp
index efa394dd1..d881e144d 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_filesystem.cpp
+++ b/src/core/hle/service/filesystem/fsp/fs_i_filesystem.cpp
@@ -2,261 +2,172 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "common/string_util.h"
+#include "core/file_sys/fssrv/fssrv_sf_path.h"
+#include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/fsp/fs_i_directory.h"
 #include "core/hle/service/filesystem/fsp/fs_i_file.h"
 #include "core/hle/service/filesystem/fsp/fs_i_filesystem.h"
-#include "core/hle/service/ipc_helpers.h"
 namespace Service::FileSystem {
-IFileSystem::IFileSystem(Core::System& system_, FileSys::VirtualDir backend_, SizeGetter size_)
+IFileSystem::IFileSystem(Core::System& system_, FileSys::VirtualDir dir_, SizeGetter size_getter_)
-    : ServiceFramework{system_, "IFileSystem"}, backend{std::move(backend_)}, size{std::move(
+    : ServiceFramework{system_, "IFileSystem"}, backend{std::make_unique<FileSys::Fsa::IFileSystem>(
-                                                                                  size_)} {
+                                                    dir_)},
+      size_getter{std::move(size_getter_)} {
    static const FunctionInfo functions[] = {
-        {0, &IFileSystem::CreateFile, "CreateFile"},
+        {0, D<&IFileSystem::CreateFile>, "CreateFile"},
-        {1, &IFileSystem::DeleteFile, "DeleteFile"},
+        {1, D<&IFileSystem::DeleteFile>, "DeleteFile"},
-        {2, &IFileSystem::CreateDirectory, "CreateDirectory"},
+        {2, D<&IFileSystem::CreateDirectory>, "CreateDirectory"},
-        {3, &IFileSystem::DeleteDirectory, "DeleteDirectory"},
+        {3, D<&IFileSystem::DeleteDirectory>, "DeleteDirectory"},
-        {4, &IFileSystem::DeleteDirectoryRecursively, "DeleteDirectoryRecursively"},
+        {4, D<&IFileSystem::DeleteDirectoryRecursively>, "DeleteDirectoryRecursively"},
-        {5, &IFileSystem::RenameFile, "RenameFile"},
+        {5, D<&IFileSystem::RenameFile>, "RenameFile"},
        {6, nullptr, "RenameDirectory"},
-        {7, &IFileSystem::GetEntryType, "GetEntryType"},
+        {7, D<&IFileSystem::GetEntryType>, "GetEntryType"},
-        {8, &IFileSystem::OpenFile, "OpenFile"},
+        {8, D<&IFileSystem::OpenFile>, "OpenFile"},
-        {9, &IFileSystem::OpenDirectory, "OpenDirectory"},
+        {9, D<&IFileSystem::OpenDirectory>, "OpenDirectory"},
-        {10, &IFileSystem::Commit, "Commit"},
+        {10, D<&IFileSystem::Commit>, "Commit"},
-        {11, &IFileSystem::GetFreeSpaceSize, "GetFreeSpaceSize"},
+        {11, D<&IFileSystem::GetFreeSpaceSize>, "GetFreeSpaceSize"},
-        {12, &IFileSystem::GetTotalSpaceSize, "GetTotalSpaceSize"},
+        {12, D<&IFileSystem::GetTotalSpaceSize>, "GetTotalSpaceSize"},
-        {13, &IFileSystem::CleanDirectoryRecursively, "CleanDirectoryRecursively"},
+        {13, D<&IFileSystem::CleanDirectoryRecursively>, "CleanDirectoryRecursively"},
-        {14, &IFileSystem::GetFileTimeStampRaw, "GetFileTimeStampRaw"},
+        {14, D<&IFileSystem::GetFileTimeStampRaw>, "GetFileTimeStampRaw"},
        {15, nullptr, "QueryEntry"},
-        {16, &IFileSystem::GetFileSystemAttribute, "GetFileSystemAttribute"},
+        {16, D<&IFileSystem::GetFileSystemAttribute>, "GetFileSystemAttribute"},
    };
    RegisterHandlers(functions);
 }
-void IFileSystem::CreateFile(HLERequestContext& ctx) {
+Result IFileSystem::CreateFile(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path,
-    IPC::RequestParser rp{ctx};
+                               s32 option, s64 size) {
+    LOG_DEBUG(Service_FS, "called. file={}, option=0x{:X}, size=0x{:08X}", path->str, option, size);
-    const auto file_buffer = ctx.ReadBuffer();
+    R_RETURN(backend->CreateFile(FileSys::Path(path->str), size));
-    const std::string name = Common::StringFromBuffer(file_buffer);
-    const u64 file_mode = rp.Pop<u64>();
-    const u32 file_size = rp.Pop<u32>();
-    LOG_DEBUG(Service_FS, "called. file={}, mode=0x{:X}, size=0x{:08X}", name, file_mode,
-              file_size);
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(backend.CreateFile(name, file_size));
 }
-void IFileSystem::DeleteFile(HLERequestContext& ctx) {
+Result IFileSystem::DeleteFile(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
-    const auto file_buffer = ctx.ReadBuffer();
+    LOG_DEBUG(Service_FS, "called. file={}", path->str);
-    const std::string name = Common::StringFromBuffer(file_buffer);
-    LOG_DEBUG(Service_FS, "called. file={}", name);
+    R_RETURN(backend->DeleteFile(FileSys::Path(path->str)));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(backend.DeleteFile(name));
 }
-void IFileSystem::CreateDirectory(HLERequestContext& ctx) {
+Result IFileSystem::CreateDirectory(
-    const auto file_buffer = ctx.ReadBuffer();
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    LOG_DEBUG(Service_FS, "called. directory={}", path->str);
-    LOG_DEBUG(Service_FS, "called. directory={}", name);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_RETURN(backend->CreateDirectory(FileSys::Path(path->str)));
-    rb.Push(backend.CreateDirectory(name));
 }
-void IFileSystem::DeleteDirectory(HLERequestContext& ctx) {
+Result IFileSystem::DeleteDirectory(
-    const auto file_buffer = ctx.ReadBuffer();
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    LOG_DEBUG(Service_FS, "called. directory={}", path->str);
-    LOG_DEBUG(Service_FS, "called. directory={}", name);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_RETURN(backend->DeleteDirectory(FileSys::Path(path->str)));
-    rb.Push(backend.DeleteDirectory(name));
 }
-void IFileSystem::DeleteDirectoryRecursively(HLERequestContext& ctx) {
+Result IFileSystem::DeleteDirectoryRecursively(
-    const auto file_buffer = ctx.ReadBuffer();
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    LOG_DEBUG(Service_FS, "called. directory={}", path->str);
-    LOG_DEBUG(Service_FS, "called. directory={}", name);
+    R_RETURN(backend->DeleteDirectoryRecursively(FileSys::Path(path->str)));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(backend.DeleteDirectoryRecursively(name));
 }
-void IFileSystem::CleanDirectoryRecursively(HLERequestContext& ctx) {
+Result IFileSystem::CleanDirectoryRecursively(
-    const auto file_buffer = ctx.ReadBuffer();
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    LOG_DEBUG(Service_FS, "called. Directory: {}", path->str);
-    LOG_DEBUG(Service_FS, "called. Directory: {}", name);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_RETURN(backend->CleanDirectoryRecursively(FileSys::Path(path->str)));
-    rb.Push(backend.CleanDirectoryRecursively(name));
 }
-void IFileSystem::RenameFile(HLERequestContext& ctx) {
+Result IFileSystem::RenameFile(
-    const std::string src_name = Common::StringFromBuffer(ctx.ReadBuffer(0));
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> old_path,
-    const std::string dst_name = Common::StringFromBuffer(ctx.ReadBuffer(1));
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> new_path) {
+    LOG_DEBUG(Service_FS, "called. file '{}' to file '{}'", old_path->str, new_path->str);
-    LOG_DEBUG(Service_FS, "called. file '{}' to file '{}'", src_name, dst_name);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_RETURN(backend->RenameFile(FileSys::Path(old_path->str), FileSys::Path(new_path->str)));
-    rb.Push(backend.RenameFile(src_name, dst_name));
 }
-void IFileSystem::OpenFile(HLERequestContext& ctx) {
+Result IFileSystem::OpenFile(OutInterface<IFile> out_interface,
-    IPC::RequestParser rp{ctx};
+                             const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path,
+                             u32 mode) {
-    const auto file_buffer = ctx.ReadBuffer();
+    LOG_DEBUG(Service_FS, "called. file={}, mode={}", path->str, mode);
-    const std::string name = Common::StringFromBuffer(file_buffer);
-    const auto mode = static_cast<FileSys::OpenMode>(rp.Pop<u32>());
-    LOG_DEBUG(Service_FS, "called. file={}, mode={}", name, mode);
    FileSys::VirtualFile vfs_file{};
-    auto result = backend.OpenFile(&vfs_file, name, mode);
+    R_TRY(backend->OpenFile(&vfs_file, FileSys::Path(path->str),
-    if (result != ResultSuccess) {
+                            static_cast<FileSys::OpenMode>(mode)));
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    auto file = std::make_shared<IFile>(system, vfs_file);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IFile>(std::move(file));
-}
-void IFileSystem::OpenDirectory(HLERequestContext& ctx) {
-    IPC::RequestParser rp{ctx};
-    const auto file_buffer = ctx.ReadBuffer();
+    *out_interface = std::make_shared<IFile>(system, vfs_file);
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    R_SUCCEED();
-    const auto mode = rp.PopRaw<FileSys::OpenDirectoryMode>();
+}
-    LOG_DEBUG(Service_FS, "called. directory={}, mode={}", name, mode);
+Result IFileSystem::OpenDirectory(OutInterface<IDirectory> out_interface,
+                                  const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path,
+                                  u32 mode) {
+    LOG_DEBUG(Service_FS, "called. directory={}, mode={}", path->str, mode);
    FileSys::VirtualDir vfs_dir{};
-    auto result = backend.OpenDirectory(&vfs_dir, name);
+    R_TRY(backend->OpenDirectory(&vfs_dir, FileSys::Path(path->str),
-    if (result != ResultSuccess) {
+                                 static_cast<FileSys::OpenDirectoryMode>(mode)));
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(result);
-        return;
-    }
-    auto directory = std::make_shared<IDirectory>(system, vfs_dir, mode);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IDirectory>(std::move(directory));
-}
-void IFileSystem::GetEntryType(HLERequestContext& ctx) {
+    *out_interface = std::make_shared<IDirectory>(system, vfs_dir,
-    const auto file_buffer = ctx.ReadBuffer();
+                                                  static_cast<FileSys::OpenDirectoryMode>(mode));
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    R_SUCCEED();
+}
-    LOG_DEBUG(Service_FS, "called. file={}", name);
+Result IFileSystem::GetEntryType(
+    Out<u32> out_type, const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
+    LOG_DEBUG(Service_FS, "called. file={}", path->str);
    FileSys::DirectoryEntryType vfs_entry_type{};
-    auto result = backend.GetEntryType(&vfs_entry_type, name);
+    R_TRY(backend->GetEntryType(&vfs_entry_type, FileSys::Path(path->str)));
-    if (result != ResultSuccess) {
-        IPC::ResponseBuilder rb{ctx, 2};
+    *out_type = static_cast<u32>(vfs_entry_type);
-        rb.Push(result);
+    R_SUCCEED();
-        return;
-    }
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(ResultSuccess);
-    rb.Push<u32>(static_cast<u32>(vfs_entry_type));
 }
-void IFileSystem::Commit(HLERequestContext& ctx) {
+Result IFileSystem::Commit() {
    LOG_WARNING(Service_FS, "(STUBBED) called");
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void IFileSystem::GetFreeSpaceSize(HLERequestContext& ctx) {
+Result IFileSystem::GetFreeSpaceSize(
+    Out<s64> out_size, const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
    LOG_DEBUG(Service_FS, "called");
-    IPC::ResponseBuilder rb{ctx, 4};
+    *out_size = size_getter.get_free_size();
-    rb.Push(ResultSuccess);
+    R_SUCCEED();
-    rb.Push(size.get_free_size());
 }
-void IFileSystem::GetTotalSpaceSize(HLERequestContext& ctx) {
+Result IFileSystem::GetTotalSpaceSize(
+    Out<s64> out_size, const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
    LOG_DEBUG(Service_FS, "called");
-    IPC::ResponseBuilder rb{ctx, 4};
+    *out_size = size_getter.get_total_size();
-    rb.Push(ResultSuccess);
+    R_SUCCEED();
-    rb.Push(size.get_total_size());
 }
-void IFileSystem::GetFileTimeStampRaw(HLERequestContext& ctx) {
+Result IFileSystem::GetFileTimeStampRaw(
-    const auto file_buffer = ctx.ReadBuffer();
+    Out<FileSys::FileTimeStampRaw> out_timestamp,
-    const std::string name = Common::StringFromBuffer(file_buffer);
+    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path) {
+    LOG_WARNING(Service_FS, "(Partial Implementation) called. file={}", path->str);
-    LOG_WARNING(Service_FS, "(Partial Implementation) called. file={}", name);
    FileSys::FileTimeStampRaw vfs_timestamp{};
-    auto result = backend.GetFileTimeStampRaw(&vfs_timestamp, name);
+    R_TRY(backend->GetFileTimeStampRaw(&vfs_timestamp, FileSys::Path(path->str)));
-    if (result != ResultSuccess) {
-        IPC::ResponseBuilder rb{ctx, 2};
+    *out_timestamp = vfs_timestamp;
-        rb.Push(result);
+    R_SUCCEED();
-        return;
-    }
-    IPC::ResponseBuilder rb{ctx, 10};
-    rb.Push(ResultSuccess);
-    rb.PushRaw(vfs_timestamp);
 }
-void IFileSystem::GetFileSystemAttribute(HLERequestContext& ctx) {
+Result IFileSystem::GetFileSystemAttribute(Out<FileSys::FileSystemAttribute> out_attribute) {
    LOG_WARNING(Service_FS, "(STUBBED) called");
-    struct FileSystemAttribute {
+    FileSys::FileSystemAttribute savedata_attribute{};
-        u8 dir_entry_name_length_max_defined;
-        u8 file_entry_name_length_max_defined;
-        u8 dir_path_name_length_max_defined;
-        u8 file_path_name_length_max_defined;
-        INSERT_PADDING_BYTES_NOINIT(0x5);
-        u8 utf16_dir_entry_name_length_max_defined;
-        u8 utf16_file_entry_name_length_max_defined;
-        u8 utf16_dir_path_name_length_max_defined;
-        u8 utf16_file_path_name_length_max_defined;
-        INSERT_PADDING_BYTES_NOINIT(0x18);
-        s32 dir_entry_name_length_max;
-        s32 file_entry_name_length_max;
-        s32 dir_path_name_length_max;
-        s32 file_path_name_length_max;
-        INSERT_PADDING_WORDS_NOINIT(0x5);
-        s32 utf16_dir_entry_name_length_max;
-        s32 utf16_file_entry_name_length_max;
-        s32 utf16_dir_path_name_length_max;
-        s32 utf16_file_path_name_length_max;
-        INSERT_PADDING_WORDS_NOINIT(0x18);
-        INSERT_PADDING_WORDS_NOINIT(0x1);
-    };
-    static_assert(sizeof(FileSystemAttribute) == 0xc0, "FileSystemAttribute has incorrect size");
-    FileSystemAttribute savedata_attribute{};
    savedata_attribute.dir_entry_name_length_max_defined = true;
    savedata_attribute.file_entry_name_length_max_defined = true;
    savedata_attribute.dir_entry_name_length_max = 0x40;
    savedata_attribute.file_entry_name_length_max = 0x40;
-    IPC::ResponseBuilder rb{ctx, 50};
+    *out_attribute = savedata_attribute;
-    rb.Push(ResultSuccess);
+    R_SUCCEED();
-    rb.PushRaw(savedata_attribute);
 }
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_filesystem.h b/src/core/hle/service/filesystem/fsp/fs_i_filesystem.h
index b06b3ef0e..dd069f36f 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_filesystem.h
+++ b/src/core/hle/service/filesystem/fsp/fs_i_filesystem.h
@@ -3,36 +3,58 @@
 #pragma once
+#include "common/common_funcs.h"
+#include "core/file_sys/fs_filesystem.h"
+#include "core/file_sys/fsa/fs_i_filesystem.h"
 #include "core/file_sys/vfs/vfs.h"
+#include "core/hle/service/cmif_types.h"
 #include "core/hle/service/filesystem/filesystem.h"
-#include "core/hle/service/filesystem/fsp/fsp_util.h"
+#include "core/hle/service/filesystem/fsp/fsp_types.h"
 #include "core/hle/service/service.h"
+namespace FileSys::Sf {
+struct Path;
+}
 namespace Service::FileSystem {
+class IFile;
+class IDirectory;
 class IFileSystem final : public ServiceFramework<IFileSystem> {
 public:
-    explicit IFileSystem(Core::System& system_, FileSys::VirtualDir backend_, SizeGetter size_);
+    explicit IFileSystem(Core::System& system_, FileSys::VirtualDir dir_, SizeGetter size_getter_);
-    void CreateFile(HLERequestContext& ctx);
+    Result CreateFile(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path, s32 option,
-    void DeleteFile(HLERequestContext& ctx);
+                      s64 size);
-    void CreateDirectory(HLERequestContext& ctx);
+    Result DeleteFile(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
-    void DeleteDirectory(HLERequestContext& ctx);
+    Result CreateDirectory(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
-    void DeleteDirectoryRecursively(HLERequestContext& ctx);
+    Result DeleteDirectory(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
-    void CleanDirectoryRecursively(HLERequestContext& ctx);
+    Result DeleteDirectoryRecursively(
-    void RenameFile(HLERequestContext& ctx);
+        const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
-    void OpenFile(HLERequestContext& ctx);
+    Result CleanDirectoryRecursively(
-    void OpenDirectory(HLERequestContext& ctx);
+        const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
-    void GetEntryType(HLERequestContext& ctx);
+    Result RenameFile(const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> old_path,
-    void Commit(HLERequestContext& ctx);
+                      const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> new_path);
-    void GetFreeSpaceSize(HLERequestContext& ctx);
+    Result OpenFile(OutInterface<IFile> out_interface,
-    void GetTotalSpaceSize(HLERequestContext& ctx);
+                    const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path, u32 mode);
-    void GetFileTimeStampRaw(HLERequestContext& ctx);
+    Result OpenDirectory(OutInterface<IDirectory> out_interface,
-    void GetFileSystemAttribute(HLERequestContext& ctx);
+                         const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path,
+                         u32 mode);
+    Result GetEntryType(Out<u32> out_type,
+                        const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
+    Result Commit();
+    Result GetFreeSpaceSize(Out<s64> out_size,
+                            const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
+    Result GetTotalSpaceSize(Out<s64> out_size,
+                             const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
+    Result GetFileTimeStampRaw(Out<FileSys::FileTimeStampRaw> out_timestamp,
+                               const InLargeData<FileSys::Sf::Path, BufferAttr_HipcPointer> path);
+    Result GetFileSystemAttribute(Out<FileSys::FileSystemAttribute> out_attribute);
 private:
-    VfsDirectoryServiceWrapper backend;
+    std::unique_ptr<FileSys::Fsa::IFileSystem> backend;
-    SizeGetter size;
+    SizeGetter size_getter;
 };
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.cpp b/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.cpp
new file mode 100644
index 000000000..626328234
--- /dev/null
+++ b/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.cpp
@@ -0,0 +1,33 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/filesystem/fsp/fs_i_filesystem.h"
+#include "core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.h"
+namespace Service::FileSystem {
+IMultiCommitManager::IMultiCommitManager(Core::System& system_)
+    : ServiceFramework{system_, "IMultiCommitManager"} {
+    static const FunctionInfo functions[] = {
+        {1, D<&IMultiCommitManager::Add>, "Add"},
+        {2, D<&IMultiCommitManager::Commit>, "Commit"},
+    };
+    RegisterHandlers(functions);
+}
+IMultiCommitManager::~IMultiCommitManager() = default;
+Result IMultiCommitManager::Add(std::shared_ptr<IFileSystem> filesystem) {
+    LOG_WARNING(Service_FS, "(STUBBED) called");
+    R_SUCCEED();
+}
+Result IMultiCommitManager::Commit() {
+    LOG_WARNING(Service_FS, "(STUBBED) called");
+    R_SUCCEED();
+}
+} // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.h b/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.h
new file mode 100644
index 000000000..8ebf7c7d9
--- /dev/null
+++ b/src/core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.h
@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/file_sys/vfs/vfs.h"
+#include "core/hle/service/service.h"
+namespace Service::FileSystem {
+class IMultiCommitManager final : public ServiceFramework<IMultiCommitManager> {
+public:
+    explicit IMultiCommitManager(Core::System& system_);
+    ~IMultiCommitManager() override;
+private:
+    Result Add(std::shared_ptr<IFileSystem> filesystem);
+    Result Commit();
+    FileSys::VirtualFile backend;
+};
+} // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.cpp b/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.cpp
new file mode 100644
index 000000000..ff823586b
--- /dev/null
+++ b/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.cpp
@@ -0,0 +1,161 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "common/hex_util.h"
+#include "core/file_sys/savedata_factory.h"
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h"
+#include "core/hle/service/filesystem/save_data_controller.h"
+namespace Service::FileSystem {
+ISaveDataInfoReader::ISaveDataInfoReader(Core::System& system_,
+                                         std::shared_ptr<SaveDataController> save_data_controller_,
+                                         FileSys::SaveDataSpaceId space)
+    : ServiceFramework{system_, "ISaveDataInfoReader"}, save_data_controller{
+                                                            save_data_controller_} {
+    static const FunctionInfo functions[] = {
+        {0, D<&ISaveDataInfoReader::ReadSaveDataInfo>, "ReadSaveDataInfo"},
+    };
+    RegisterHandlers(functions);
+    FindAllSaves(space);
+}
+ISaveDataInfoReader::~ISaveDataInfoReader() = default;
+static u64 stoull_be(std::string_view str) {
+    if (str.size() != 16) {
+        return 0;
+    }
+    const auto bytes = Common::HexStringToArray<0x8>(str);
+    u64 out{};
+    std::memcpy(&out, bytes.data(), sizeof(u64));
+    return Common::swap64(out);
+}
+Result ISaveDataInfoReader::ReadSaveDataInfo(
+    Out<u64> out_count, OutArray<SaveDataInfo, BufferAttr_HipcMapAlias> out_entries) {
+    LOG_DEBUG(Service_FS, "called");
+    // Calculate how many entries we can fit in the output buffer
+    const u64 count_entries = out_entries.size();
+    // Cap at total number of entries.
+    const u64 actual_entries = std::min(count_entries, info.size() - next_entry_index);
+    // Determine data start and end
+    const auto* begin = reinterpret_cast<u8*>(info.data() + next_entry_index);
+    const auto* end = reinterpret_cast<u8*>(info.data() + next_entry_index + actual_entries);
+    const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
+    next_entry_index += actual_entries;
+    // Write the data to memory
+    std::memcpy(out_entries.data(), begin, range_size);
+    *out_count = actual_entries;
+    R_SUCCEED();
+}
+void ISaveDataInfoReader::FindAllSaves(FileSys::SaveDataSpaceId space) {
+    FileSys::VirtualDir save_root{};
+    const auto result = save_data_controller->OpenSaveDataSpace(&save_root, space);
+    if (result != ResultSuccess || save_root == nullptr) {
+        LOG_ERROR(Service_FS, "The save root for the space_id={:02X} was invalid!", space);
+        return;
+    }
+    for (const auto& type : save_root->GetSubdirectories()) {
+        if (type->GetName() == "save") {
+            FindNormalSaves(space, type);
+        } else if (space == FileSys::SaveDataSpaceId::Temporary) {
+            FindTemporaryStorageSaves(space, type);
+        }
+    }
+}
+void ISaveDataInfoReader::FindNormalSaves(FileSys::SaveDataSpaceId space,
+                                          const FileSys::VirtualDir& type) {
+    for (const auto& save_id : type->GetSubdirectories()) {
+        for (const auto& user_id : save_id->GetSubdirectories()) {
+            // Skip non user id subdirectories
+            if (user_id->GetName().size() != 0x20) {
+                continue;
+            }
+            const auto save_id_numeric = stoull_be(save_id->GetName());
+            auto user_id_numeric = Common::HexStringToArray<0x10>(user_id->GetName());
+            std::reverse(user_id_numeric.begin(), user_id_numeric.end());
+            if (save_id_numeric != 0) {
+                // System Save Data
+                info.emplace_back(SaveDataInfo{
+                    0,
+                    space,
+                    FileSys::SaveDataType::System,
+                    {},
+                    user_id_numeric,
+                    save_id_numeric,
+                    0,
+                    user_id->GetSize(),
+                    {},
+                    {},
+                });
+                continue;
+            }
+            for (const auto& title_id : user_id->GetSubdirectories()) {
+                const auto device = std::all_of(user_id_numeric.begin(), user_id_numeric.end(),
+                                                [](u8 val) { return val == 0; });
+                info.emplace_back(SaveDataInfo{
+                    0,
+                    space,
+                    device ? FileSys::SaveDataType::Device : FileSys::SaveDataType::Account,
+                    {},
+                    user_id_numeric,
+                    save_id_numeric,
+                    stoull_be(title_id->GetName()),
+                    title_id->GetSize(),
+                    {},
+                    {},
+                });
+            }
+        }
+    }
+}
+void ISaveDataInfoReader::FindTemporaryStorageSaves(FileSys::SaveDataSpaceId space,
+                                                    const FileSys::VirtualDir& type) {
+    for (const auto& user_id : type->GetSubdirectories()) {
+        // Skip non user id subdirectories
+        if (user_id->GetName().size() != 0x20) {
+            continue;
+        }
+        for (const auto& title_id : user_id->GetSubdirectories()) {
+            if (!title_id->GetFiles().empty() || !title_id->GetSubdirectories().empty()) {
+                auto user_id_numeric = Common::HexStringToArray<0x10>(user_id->GetName());
+                std::reverse(user_id_numeric.begin(), user_id_numeric.end());
+                info.emplace_back(SaveDataInfo{
+                    0,
+                    space,
+                    FileSys::SaveDataType::Temporary,
+                    {},
+                    user_id_numeric,
+                    stoull_be(type->GetName()),
+                    stoull_be(title_id->GetName()),
+                    title_id->GetSize(),
+                    {},
+                    {},
+                });
+            }
+        }
+    }
+}
+} // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h b/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h
new file mode 100644
index 000000000..e45ad852b
--- /dev/null
+++ b/src/core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h
@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include <vector>
+#include "common/common_types.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::FileSystem {
+class SaveDataController;
+class ISaveDataInfoReader final : public ServiceFramework<ISaveDataInfoReader> {
+public:
+    explicit ISaveDataInfoReader(Core::System& system_,
+                                 std::shared_ptr<SaveDataController> save_data_controller_,
+                                 FileSys::SaveDataSpaceId space);
+    ~ISaveDataInfoReader() override;
+    struct SaveDataInfo {
+        u64_le save_id_unknown;
+        FileSys::SaveDataSpaceId space;
+        FileSys::SaveDataType type;
+        INSERT_PADDING_BYTES(0x6);
+        std::array<u8, 0x10> user_id;
+        u64_le save_id;
+        u64_le title_id;
+        u64_le save_image_size;
+        u16_le index;
+        FileSys::SaveDataRank rank;
+        INSERT_PADDING_BYTES(0x25);
+    };
+    static_assert(sizeof(SaveDataInfo) == 0x60, "SaveDataInfo has incorrect size.");
+    Result ReadSaveDataInfo(Out<u64> out_count,
+                            OutArray<SaveDataInfo, BufferAttr_HipcMapAlias> out_entries);
+private:
+    void FindAllSaves(FileSys::SaveDataSpaceId space);
+    void FindNormalSaves(FileSys::SaveDataSpaceId space, const FileSys::VirtualDir& type);
+    void FindTemporaryStorageSaves(FileSys::SaveDataSpaceId space, const FileSys::VirtualDir& type);
+    std::shared_ptr<SaveDataController> save_data_controller;
+    std::vector<SaveDataInfo> info;
+    u64 next_entry_index = 0;
+};
+} // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_storage.cpp b/src/core/hle/service/filesystem/fsp/fs_i_storage.cpp
index 98223c1f9..213f19808 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_storage.cpp
+++ b/src/core/hle/service/filesystem/fsp/fs_i_storage.cpp
@@ -2,61 +2,44 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "core/file_sys/errors.h"
+#include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/fsp/fs_i_storage.h"
-#include "core/hle/service/ipc_helpers.h"
 namespace Service::FileSystem {
 IStorage::IStorage(Core::System& system_, FileSys::VirtualFile backend_)
    : ServiceFramework{system_, "IStorage"}, backend(std::move(backend_)) {
    static const FunctionInfo functions[] = {
-        {0, &IStorage::Read, "Read"},
+        {0, D<&IStorage::Read>, "Read"},
        {1, nullptr, "Write"},
        {2, nullptr, "Flush"},
        {3, nullptr, "SetSize"},
-        {4, &IStorage::GetSize, "GetSize"},
+        {4, D<&IStorage::GetSize>, "GetSize"},
        {5, nullptr, "OperateRange"},
    };
    RegisterHandlers(functions);
 }
-void IStorage::Read(HLERequestContext& ctx) {
+Result IStorage::Read(
-    IPC::RequestParser rp{ctx};
+    OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_bytes,
-    const s64 offset = rp.Pop<s64>();
+    s64 offset, s64 length) {
-    const s64 length = rp.Pop<s64>();
    LOG_DEBUG(Service_FS, "called, offset=0x{:X}, length={}", offset, length);
-    // Error checking
+    R_UNLESS(length >= 0, FileSys::ResultInvalidSize);
-    if (length < 0) {
+    R_UNLESS(offset >= 0, FileSys::ResultInvalidOffset);
-        LOG_ERROR(Service_FS, "Length is less than 0, length={}", length);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidSize);
-        return;
-    }
-    if (offset < 0) {
-        LOG_ERROR(Service_FS, "Offset is less than 0, offset={}", offset);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(FileSys::ResultInvalidOffset);
-        return;
-    }
    // Read the data from the Storage backend
-    std::vector<u8> output = backend->ReadBytes(length, offset);
+    backend->Read(out_bytes.data(), length, offset);
-    // Write the data to memory
-    ctx.WriteBuffer(output);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void IStorage::GetSize(HLERequestContext& ctx) {
+Result IStorage::GetSize(Out<u64> out_size) {
-    const u64 size = backend->GetSize();
+    *out_size = backend->GetSize();
-    LOG_DEBUG(Service_FS, "called, size={}", size);
+    LOG_DEBUG(Service_FS, "called, size={}", *out_size);
-    IPC::ResponseBuilder rb{ctx, 4};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.Push<u64>(size);
 }
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_storage.h b/src/core/hle/service/filesystem/fsp/fs_i_storage.h
index cb5bebcc9..74d879386 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_storage.h
+++ b/src/core/hle/service/filesystem/fsp/fs_i_storage.h
@@ -4,6 +4,7 @@
 #pragma once
 #include "core/file_sys/vfs/vfs.h"
+#include "core/hle/service/cmif_types.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/service.h"
@@ -16,8 +17,10 @@ public:
 private:
    FileSys::VirtualFile backend;
-    void Read(HLERequestContext& ctx);
+    Result Read(
-    void GetSize(HLERequestContext& ctx);
+        OutBuffer<BufferAttr_HipcMapAlias | BufferAttr_HipcMapTransferAllowsNonSecure> out_bytes,
+        s64 offset, s64 length);
+    Result GetSize(Out<u64> out_size);
 };
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fsp_srv.cpp b/src/core/hle/service/filesystem/fsp/fsp_srv.cpp
index 2d49f30c8..fc67a4713 100644
--- a/src/core/hle/service/filesystem/fsp/fsp_srv.cpp
+++ b/src/core/hle/service/filesystem/fsp/fsp_srv.cpp
@@ -27,8 +27,11 @@
 #include "core/file_sys/system_archive/system_archive.h"
 #include "core/file_sys/vfs/vfs.h"
 #include "core/hle/result.h"
+#include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/filesystem/fsp/fs_i_filesystem.h"
+#include "core/hle/service/filesystem/fsp/fs_i_multi_commit_manager.h"
+#include "core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h"
 #include "core/hle/service/filesystem/fsp/fs_i_storage.h"
 #include "core/hle/service/filesystem/fsp/fsp_srv.h"
 #include "core/hle/service/filesystem/romfs_controller.h"
@@ -39,182 +42,6 @@
 #include "core/reporter.h"
 namespace Service::FileSystem {
-enum class FileSystemProxyType : u8 {
-    Code = 0,
-    Rom = 1,
-    Logo = 2,
-    Control = 3,
-    Manual = 4,
-    Meta = 5,
-    Data = 6,
-    Package = 7,
-    RegisteredUpdate = 8,
-};
-class ISaveDataInfoReader final : public ServiceFramework<ISaveDataInfoReader> {
-public:
-    explicit ISaveDataInfoReader(Core::System& system_,
-                                 std::shared_ptr<SaveDataController> save_data_controller_,
-                                 FileSys::SaveDataSpaceId space)
-        : ServiceFramework{system_, "ISaveDataInfoReader"}, save_data_controller{
-                                                                save_data_controller_} {
-        static const FunctionInfo functions[] = {
-            {0, &ISaveDataInfoReader::ReadSaveDataInfo, "ReadSaveDataInfo"},
-        };
-        RegisterHandlers(functions);
-        FindAllSaves(space);
-    }
-    void ReadSaveDataInfo(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_FS, "called");
-        // Calculate how many entries we can fit in the output buffer
-        const u64 count_entries = ctx.GetWriteBufferNumElements<SaveDataInfo>();
-        // Cap at total number of entries.
-        const u64 actual_entries = std::min(count_entries, info.size() - next_entry_index);
-        // Determine data start and end
-        const auto* begin = reinterpret_cast<u8*>(info.data() + next_entry_index);
-        const auto* end = reinterpret_cast<u8*>(info.data() + next_entry_index + actual_entries);
-        const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
-        next_entry_index += actual_entries;
-        // Write the data to memory
-        ctx.WriteBuffer(begin, range_size);
-        IPC::ResponseBuilder rb{ctx, 4};
-        rb.Push(ResultSuccess);
-        rb.Push<u64>(actual_entries);
-    }
-private:
-    static u64 stoull_be(std::string_view str) {
-        if (str.size() != 16)
-            return 0;
-        const auto bytes = Common::HexStringToArray<0x8>(str);
-        u64 out{};
-        std::memcpy(&out, bytes.data(), sizeof(u64));
-        return Common::swap64(out);
-    }
-    void FindAllSaves(FileSys::SaveDataSpaceId space) {
-        FileSys::VirtualDir save_root{};
-        const auto result = save_data_controller->OpenSaveDataSpace(&save_root, space);
-        if (result != ResultSuccess || save_root == nullptr) {
-            LOG_ERROR(Service_FS, "The save root for the space_id={:02X} was invalid!", space);
-            return;
-        }
-        for (const auto& type : save_root->GetSubdirectories()) {
-            if (type->GetName() == "save") {
-                for (const auto& save_id : type->GetSubdirectories()) {
-                    for (const auto& user_id : save_id->GetSubdirectories()) {
-                        // Skip non user id subdirectories
-                        if (user_id->GetName().size() != 0x20) {
-                            continue;
-                        }
-                        const auto save_id_numeric = stoull_be(save_id->GetName());
-                        auto user_id_numeric = Common::HexStringToArray<0x10>(user_id->GetName());
-                        std::reverse(user_id_numeric.begin(), user_id_numeric.end());
-                        if (save_id_numeric != 0) {
-                            // System Save Data
-                            info.emplace_back(SaveDataInfo{
-                                0,
-                                space,
-                                FileSys::SaveDataType::SystemSaveData,
-                                {},
-                                user_id_numeric,
-                                save_id_numeric,
-                                0,
-                                user_id->GetSize(),
-                                {},
-                                {},
-                            });
-                            continue;
-                        }
-                        for (const auto& title_id : user_id->GetSubdirectories()) {
-                            const auto device =
-                                std::all_of(user_id_numeric.begin(), user_id_numeric.end(),
-                                            [](u8 val) { return val == 0; });
-                            info.emplace_back(SaveDataInfo{
-                                0,
-                                space,
-                                device ? FileSys::SaveDataType::DeviceSaveData
-                                       : FileSys::SaveDataType::SaveData,
-                                {},
-                                user_id_numeric,
-                                save_id_numeric,
-                                stoull_be(title_id->GetName()),
-                                title_id->GetSize(),
-                                {},
-                                {},
-                            });
-                        }
-                    }
-                }
-            } else if (space == FileSys::SaveDataSpaceId::TemporaryStorage) {
-                // Temporary Storage
-                for (const auto& user_id : type->GetSubdirectories()) {
-                    // Skip non user id subdirectories
-                    if (user_id->GetName().size() != 0x20) {
-                        continue;
-                    }
-                    for (const auto& title_id : user_id->GetSubdirectories()) {
-                        if (!title_id->GetFiles().empty() ||
-                            !title_id->GetSubdirectories().empty()) {
-                            auto user_id_numeric =
-                                Common::HexStringToArray<0x10>(user_id->GetName());
-                            std::reverse(user_id_numeric.begin(), user_id_numeric.end());
-                            info.emplace_back(SaveDataInfo{
-                                0,
-                                space,
-                                FileSys::SaveDataType::TemporaryStorage,
-                                {},
-                                user_id_numeric,
-                                stoull_be(type->GetName()),
-                                stoull_be(title_id->GetName()),
-                                title_id->GetSize(),
-                                {},
-                                {},
-                            });
-                        }
-                    }
-                }
-            }
-        }
-    }
-    struct SaveDataInfo {
-        u64_le save_id_unknown;
-        FileSys::SaveDataSpaceId space;
-        FileSys::SaveDataType type;
-        INSERT_PADDING_BYTES(0x6);
-        std::array<u8, 0x10> user_id;
-        u64_le save_id;
-        u64_le title_id;
-        u64_le save_image_size;
-        u16_le index;
-        FileSys::SaveDataRank rank;
-        INSERT_PADDING_BYTES(0x25);
-    };
-    static_assert(sizeof(SaveDataInfo) == 0x60, "SaveDataInfo has incorrect size.");
-    ProcessId process_id = 0;
-    std::shared_ptr<SaveDataController> save_data_controller;
-    std::vector<SaveDataInfo> info;
-    u64 next_entry_index = 0;
-};
 FSP_SRV::FSP_SRV(Core::System& system_)
    : ServiceFramework{system_, "fsp-srv"}, fsc{system.GetFileSystemController()},
@@ -222,20 +49,20 @@ FSP_SRV::FSP_SRV(Core::System& system_)
    // clang-format off
    static const FunctionInfo functions[] = {
        {0, nullptr, "OpenFileSystem"},
-        {1, &FSP_SRV::SetCurrentProcess, "SetCurrentProcess"},
+        {1, D<&FSP_SRV::SetCurrentProcess>, "SetCurrentProcess"},
        {2, nullptr, "OpenDataFileSystemByCurrentProcess"},
-        {7, &FSP_SRV::OpenFileSystemWithPatch, "OpenFileSystemWithPatch"},
+        {7, D<&FSP_SRV::OpenFileSystemWithPatch>, "OpenFileSystemWithPatch"},
        {8, nullptr, "OpenFileSystemWithId"},
        {9, nullptr, "OpenDataFileSystemByApplicationId"},
        {11, nullptr, "OpenBisFileSystem"},
        {12, nullptr, "OpenBisStorage"},
        {13, nullptr, "InvalidateBisCache"},
        {17, nullptr, "OpenHostFileSystem"},
-        {18, &FSP_SRV::OpenSdCardFileSystem, "OpenSdCardFileSystem"},
+        {18, D<&FSP_SRV::OpenSdCardFileSystem>, "OpenSdCardFileSystem"},
        {19, nullptr, "FormatSdCardFileSystem"},
        {21, nullptr, "DeleteSaveDataFileSystem"},
-        {22, &FSP_SRV::CreateSaveDataFileSystem, "CreateSaveDataFileSystem"},
+        {22, D<&FSP_SRV::CreateSaveDataFileSystem>, "CreateSaveDataFileSystem"},
-        {23, &FSP_SRV::CreateSaveDataFileSystemBySystemSaveDataId, "CreateSaveDataFileSystemBySystemSaveDataId"},
+        {23, D<&FSP_SRV::CreateSaveDataFileSystemBySystemSaveDataId>, "CreateSaveDataFileSystemBySystemSaveDataId"},
        {24, nullptr, "RegisterSaveDataFileSystemAtomicDeletion"},
        {25, nullptr, "DeleteSaveDataFileSystemBySaveDataSpaceId"},
        {26, nullptr, "FormatSdCardDryRun"},
@@ -245,26 +72,26 @@ FSP_SRV::FSP_SRV(Core::System& system_)
        {31, nullptr, "OpenGameCardFileSystem"},
        {32, nullptr, "ExtendSaveDataFileSystem"},
        {33, nullptr, "DeleteCacheStorage"},
-        {34, &FSP_SRV::GetCacheStorageSize, "GetCacheStorageSize"},
+        {34, D<&FSP_SRV::GetCacheStorageSize>, "GetCacheStorageSize"},
        {35, nullptr, "CreateSaveDataFileSystemByHashSalt"},
        {36, nullptr, "OpenHostFileSystemWithOption"},
-        {51, &FSP_SRV::OpenSaveDataFileSystem, "OpenSaveDataFileSystem"},
+        {51, D<&FSP_SRV::OpenSaveDataFileSystem>, "OpenSaveDataFileSystem"},
-        {52, &FSP_SRV::OpenSaveDataFileSystemBySystemSaveDataId, "OpenSaveDataFileSystemBySystemSaveDataId"},
+        {52, D<&FSP_SRV::OpenSaveDataFileSystemBySystemSaveDataId>, "OpenSaveDataFileSystemBySystemSaveDataId"},
-        {53, &FSP_SRV::OpenReadOnlySaveDataFileSystem, "OpenReadOnlySaveDataFileSystem"},
+        {53, D<&FSP_SRV::OpenReadOnlySaveDataFileSystem>, "OpenReadOnlySaveDataFileSystem"},
        {57, nullptr, "ReadSaveDataFileSystemExtraDataBySaveDataSpaceId"},
        {58, nullptr, "ReadSaveDataFileSystemExtraData"},
        {59, nullptr, "WriteSaveDataFileSystemExtraData"},
        {60, nullptr, "OpenSaveDataInfoReader"},
-        {61, &FSP_SRV::OpenSaveDataInfoReaderBySaveDataSpaceId, "OpenSaveDataInfoReaderBySaveDataSpaceId"},
+        {61, D<&FSP_SRV::OpenSaveDataInfoReaderBySaveDataSpaceId>, "OpenSaveDataInfoReaderBySaveDataSpaceId"},
-        {62, &FSP_SRV::OpenSaveDataInfoReaderOnlyCacheStorage, "OpenSaveDataInfoReaderOnlyCacheStorage"},
+        {62, D<&FSP_SRV::OpenSaveDataInfoReaderOnlyCacheStorage>, "OpenSaveDataInfoReaderOnlyCacheStorage"},
        {64, nullptr, "OpenSaveDataInternalStorageFileSystem"},
        {65, nullptr, "UpdateSaveDataMacForDebug"},
        {66, nullptr, "WriteSaveDataFileSystemExtraData2"},
        {67, nullptr, "FindSaveDataWithFilter"},
        {68, nullptr, "OpenSaveDataInfoReaderBySaveDataFilter"},
        {69, nullptr, "ReadSaveDataFileSystemExtraDataBySaveDataAttribute"},
-        {70, &FSP_SRV::WriteSaveDataFileSystemExtraDataBySaveDataAttribute, "WriteSaveDataFileSystemExtraDataBySaveDataAttribute"},
+        {70, D<&FSP_SRV::WriteSaveDataFileSystemExtraDataBySaveDataAttribute>, "WriteSaveDataFileSystemExtraDataBySaveDataAttribute"},
-        {71, &FSP_SRV::ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute, "ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute"},
+        {71, D<&FSP_SRV::ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute>, "ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute"},
        {80, nullptr, "OpenSaveDataMetaFile"},
        {81, nullptr, "OpenSaveDataTransferManager"},
        {82, nullptr, "OpenSaveDataTransferManagerVersion2"},
@@ -279,12 +106,12 @@ FSP_SRV::FSP_SRV(Core::System& system_)
        {110, nullptr, "OpenContentStorageFileSystem"},
        {120, nullptr, "OpenCloudBackupWorkStorageFileSystem"},
        {130, nullptr, "OpenCustomStorageFileSystem"},
-        {200, &FSP_SRV::OpenDataStorageByCurrentProcess, "OpenDataStorageByCurrentProcess"},
+        {200, D<&FSP_SRV::OpenDataStorageByCurrentProcess>, "OpenDataStorageByCurrentProcess"},
        {201, nullptr, "OpenDataStorageByProgramId"},
-        {202, &FSP_SRV::OpenDataStorageByDataId, "OpenDataStorageByDataId"},
+        {202, D<&FSP_SRV::OpenDataStorageByDataId>, "OpenDataStorageByDataId"},
-        {203, &FSP_SRV::OpenPatchDataStorageByCurrentProcess, "OpenPatchDataStorageByCurrentProcess"},
+        {203, D<&FSP_SRV::OpenPatchDataStorageByCurrentProcess>, "OpenPatchDataStorageByCurrentProcess"},
        {204, nullptr, "OpenDataFileSystemByProgramIndex"},
-        {205, &FSP_SRV::OpenDataStorageWithProgramIndex, "OpenDataStorageWithProgramIndex"},
+        {205, D<&FSP_SRV::OpenDataStorageWithProgramIndex>, "OpenDataStorageWithProgramIndex"},
        {206, nullptr, "OpenDataStorageByPath"},
        {400, nullptr, "OpenDeviceOperator"},
        {500, nullptr, "OpenSdCardDetectionEventNotifier"},
@@ -324,25 +151,25 @@ FSP_SRV::FSP_SRV(Core::System& system_)
        {1000, nullptr, "SetBisRootForHost"},
        {1001, nullptr, "SetSaveDataSize"},
        {1002, nullptr, "SetSaveDataRootPath"},
-        {1003, &FSP_SRV::DisableAutoSaveDataCreation, "DisableAutoSaveDataCreation"},
+        {1003, D<&FSP_SRV::DisableAutoSaveDataCreation>, "DisableAutoSaveDataCreation"},
-        {1004, &FSP_SRV::SetGlobalAccessLogMode, "SetGlobalAccessLogMode"},
+        {1004, D<&FSP_SRV::SetGlobalAccessLogMode>, "SetGlobalAccessLogMode"},
-        {1005, &FSP_SRV::GetGlobalAccessLogMode, "GetGlobalAccessLogMode"},
+        {1005, D<&FSP_SRV::GetGlobalAccessLogMode>, "GetGlobalAccessLogMode"},
-        {1006, &FSP_SRV::OutputAccessLogToSdCard, "OutputAccessLogToSdCard"},
+        {1006, D<&FSP_SRV::OutputAccessLogToSdCard>, "OutputAccessLogToSdCard"},
        {1007, nullptr, "RegisterUpdatePartition"},
        {1008, nullptr, "OpenRegisteredUpdatePartition"},
        {1009, nullptr, "GetAndClearMemoryReportInfo"},
        {1010, nullptr, "SetDataStorageRedirectTarget"},
-        {1011, &FSP_SRV::GetProgramIndexForAccessLog, "GetProgramIndexForAccessLog"},
+        {1011, D<&FSP_SRV::GetProgramIndexForAccessLog>, "GetProgramIndexForAccessLog"},
        {1012, nullptr, "GetFsStackUsage"},
        {1013, nullptr, "UnsetSaveDataRootPath"},
        {1014, nullptr, "OutputMultiProgramTagAccessLog"},
-        {1016, &FSP_SRV::FlushAccessLogOnSdCard, "FlushAccessLogOnSdCard"},
+        {1016, D<&FSP_SRV::FlushAccessLogOnSdCard>, "FlushAccessLogOnSdCard"},
        {1017, nullptr, "OutputApplicationInfoAccessLog"},
        {1018, nullptr, "SetDebugOption"},
        {1019, nullptr, "UnsetDebugOption"},
        {1100, nullptr, "OverrideSaveDataTransferTokenSignVerificationKey"},
        {1110, nullptr, "CorruptSaveDataFileSystemBySaveDataSpaceId2"},
-        {1200, &FSP_SRV::OpenMultiCommitManager, "OpenMultiCommitManager"},
+        {1200, D<&FSP_SRV::OpenMultiCommitManager>, "OpenMultiCommitManager"},
        {1300, nullptr, "OpenBisWiper"},
    };
    // clang-format on
@@ -355,234 +182,177 @@ FSP_SRV::FSP_SRV(Core::System& system_)
 FSP_SRV::~FSP_SRV() = default;
-void FSP_SRV::SetCurrentProcess(HLERequestContext& ctx) {
+Result FSP_SRV::SetCurrentProcess(ClientProcessId pid) {
-    current_process_id = ctx.GetPID();
+    current_process_id = *pid;
    LOG_DEBUG(Service_FS, "called. current_process_id=0x{:016X}", current_process_id);
-    const auto res =
+    R_RETURN(
-        fsc.OpenProcess(&program_id, &save_data_controller, &romfs_controller, current_process_id);
+        fsc.OpenProcess(&program_id, &save_data_controller, &romfs_controller, current_process_id));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(res);
 }
-void FSP_SRV::OpenFileSystemWithPatch(HLERequestContext& ctx) {
+Result FSP_SRV::OpenFileSystemWithPatch(OutInterface<IFileSystem> out_interface,
-    IPC::RequestParser rp{ctx};
+                                        FileSystemProxyType type, u64 open_program_id) {
+    LOG_ERROR(Service_FS, "(STUBBED) called with type={}, program_id={:016X}", type,
-    struct InputParameters {
+              open_program_id);
-        FileSystemProxyType type;
-        u64 program_id;
-    };
-    static_assert(sizeof(InputParameters) == 0x10, "InputParameters has wrong size");
-    const auto params = rp.PopRaw<InputParameters>();
-    LOG_ERROR(Service_FS, "(STUBBED) called with type={}, program_id={:016X}", params.type,
-              params.program_id);
    // FIXME: many issues with this
-    ASSERT(params.type == FileSystemProxyType::Manual);
+    ASSERT(type == FileSystemProxyType::Manual);
    const auto manual_romfs = romfs_controller->OpenPatchedRomFS(
-        params.program_id, FileSys::ContentRecordType::HtmlDocument);
+        open_program_id, FileSys::ContentRecordType::HtmlDocument);
    ASSERT(manual_romfs != nullptr);
    const auto extracted_romfs = FileSys::ExtractRomFS(manual_romfs);
    ASSERT(extracted_romfs != nullptr);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    *out_interface = std::make_shared<IFileSystem>(
-    rb.Push(ResultSuccess);
+        system, extracted_romfs, SizeGetter::FromStorageId(fsc, FileSys::StorageId::NandUser));
-    rb.PushIpcInterface<IFileSystem>(system, extracted_romfs,
-                                     SizeGetter::FromStorageId(fsc, FileSys::StorageId::NandUser));
+    R_SUCCEED();
 }
-void FSP_SRV::OpenSdCardFileSystem(HLERequestContext& ctx) {
+Result FSP_SRV::OpenSdCardFileSystem(OutInterface<IFileSystem> out_interface) {
    LOG_DEBUG(Service_FS, "called");
    FileSys::VirtualDir sdmc_dir{};
    fsc.OpenSDMC(&sdmc_dir);
-    auto filesystem = std::make_shared<IFileSystem>(
+    *out_interface = std::make_shared<IFileSystem>(
        system, sdmc_dir, SizeGetter::FromStorageId(fsc, FileSys::StorageId::SdCard));
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IFileSystem>(std::move(filesystem));
 }
-void FSP_SRV::CreateSaveDataFileSystem(HLERequestContext& ctx) {
+Result FSP_SRV::CreateSaveDataFileSystem(FileSys::SaveDataCreationInfo save_create_struct,
-    IPC::RequestParser rp{ctx};
+                                         FileSys::SaveDataAttribute save_struct, u128 uid) {
-    auto save_struct = rp.PopRaw<FileSys::SaveDataAttribute>();
-    [[maybe_unused]] auto save_create_struct = rp.PopRaw<std::array<u8, 0x40>>();
-    u128 uid = rp.PopRaw<u128>();
    LOG_DEBUG(Service_FS, "called save_struct = {}, uid = {:016X}{:016X}", save_struct.DebugInfo(),
              uid[1], uid[0]);
    FileSys::VirtualDir save_data_dir{};
-    save_data_controller->CreateSaveData(&save_data_dir, FileSys::SaveDataSpaceId::NandUser,
+    R_RETURN(save_data_controller->CreateSaveData(&save_data_dir, FileSys::SaveDataSpaceId::User,
-                                         save_struct);
+                                                  save_struct));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::CreateSaveDataFileSystemBySystemSaveDataId(HLERequestContext& ctx) {
+Result FSP_SRV::CreateSaveDataFileSystemBySystemSaveDataId(
-    IPC::RequestParser rp{ctx};
+    FileSys::SaveDataCreationInfo save_create_struct, FileSys::SaveDataAttribute save_struct) {
-    auto save_struct = rp.PopRaw<FileSys::SaveDataAttribute>();
-    [[maybe_unused]] auto save_create_struct = rp.PopRaw<std::array<u8, 0x40>>();
    LOG_DEBUG(Service_FS, "called save_struct = {}", save_struct.DebugInfo());
    FileSys::VirtualDir save_data_dir{};
-    save_data_controller->CreateSaveData(&save_data_dir, FileSys::SaveDataSpaceId::NandSystem,
+    R_RETURN(save_data_controller->CreateSaveData(&save_data_dir, FileSys::SaveDataSpaceId::System,
-                                         save_struct);
+                                                  save_struct));
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::OpenSaveDataFileSystem(HLERequestContext& ctx) {
+Result FSP_SRV::OpenSaveDataFileSystem(OutInterface<IFileSystem> out_interface,
-    IPC::RequestParser rp{ctx};
+                                       FileSys::SaveDataSpaceId space_id,
+                                       FileSys::SaveDataAttribute attribute) {
-    struct Parameters {
-        FileSys::SaveDataSpaceId space_id;
-        FileSys::SaveDataAttribute attribute;
-    };
-    const auto parameters = rp.PopRaw<Parameters>();
    LOG_INFO(Service_FS, "called.");
    FileSys::VirtualDir dir{};
-    auto result =
+    R_TRY(save_data_controller->OpenSaveData(&dir, space_id, attribute));
-        save_data_controller->OpenSaveData(&dir, parameters.space_id, parameters.attribute);
-    if (result != ResultSuccess) {
-        IPC::ResponseBuilder rb{ctx, 2, 0, 0};
-        rb.Push(FileSys::ResultTargetNotFound);
-        return;
-    }
    FileSys::StorageId id{};
-    switch (parameters.space_id) {
+    switch (space_id) {
-    case FileSys::SaveDataSpaceId::NandUser:
+    case FileSys::SaveDataSpaceId::User:
        id = FileSys::StorageId::NandUser;
        break;
-    case FileSys::SaveDataSpaceId::SdCardSystem:
+    case FileSys::SaveDataSpaceId::SdSystem:
-    case FileSys::SaveDataSpaceId::SdCardUser:
+    case FileSys::SaveDataSpaceId::SdUser:
        id = FileSys::StorageId::SdCard;
        break;
-    case FileSys::SaveDataSpaceId::NandSystem:
+    case FileSys::SaveDataSpaceId::System:
        id = FileSys::StorageId::NandSystem;
        break;
-    case FileSys::SaveDataSpaceId::TemporaryStorage:
+    case FileSys::SaveDataSpaceId::Temporary:
    case FileSys::SaveDataSpaceId::ProperSystem:
    case FileSys::SaveDataSpaceId::SafeMode:
        ASSERT(false);
    }
-    auto filesystem =
+    *out_interface =
        std::make_shared<IFileSystem>(system, std::move(dir), SizeGetter::FromStorageId(fsc, id));
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IFileSystem>(std::move(filesystem));
 }
-void FSP_SRV::OpenSaveDataFileSystemBySystemSaveDataId(HLERequestContext& ctx) {
+Result FSP_SRV::OpenSaveDataFileSystemBySystemSaveDataId(OutInterface<IFileSystem> out_interface,
+                                                         FileSys::SaveDataSpaceId space_id,
+                                                         FileSys::SaveDataAttribute attribute) {
    LOG_WARNING(Service_FS, "(STUBBED) called, delegating to 51 OpenSaveDataFilesystem");
-    OpenSaveDataFileSystem(ctx);
+    R_RETURN(OpenSaveDataFileSystem(out_interface, space_id, attribute));
 }
-void FSP_SRV::OpenReadOnlySaveDataFileSystem(HLERequestContext& ctx) {
+Result FSP_SRV::OpenReadOnlySaveDataFileSystem(OutInterface<IFileSystem> out_interface,
+                                               FileSys::SaveDataSpaceId space_id,
+                                               FileSys::SaveDataAttribute attribute) {
    LOG_WARNING(Service_FS, "(STUBBED) called, delegating to 51 OpenSaveDataFilesystem");
-    OpenSaveDataFileSystem(ctx);
+    R_RETURN(OpenSaveDataFileSystem(out_interface, space_id, attribute));
 }
-void FSP_SRV::OpenSaveDataInfoReaderBySaveDataSpaceId(HLERequestContext& ctx) {
+Result FSP_SRV::OpenSaveDataInfoReaderBySaveDataSpaceId(
-    IPC::RequestParser rp{ctx};
+    OutInterface<ISaveDataInfoReader> out_interface, FileSys::SaveDataSpaceId space) {
-    const auto space = rp.PopRaw<FileSys::SaveDataSpaceId>();
    LOG_INFO(Service_FS, "called, space={}", space);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    *out_interface = std::make_shared<ISaveDataInfoReader>(system, save_data_controller, space);
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<ISaveDataInfoReader>(
+    R_SUCCEED();
-        std::make_shared<ISaveDataInfoReader>(system, save_data_controller, space));
 }
-void FSP_SRV::OpenSaveDataInfoReaderOnlyCacheStorage(HLERequestContext& ctx) {
+Result FSP_SRV::OpenSaveDataInfoReaderOnlyCacheStorage(
+    OutInterface<ISaveDataInfoReader> out_interface) {
    LOG_WARNING(Service_FS, "(STUBBED) called");
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    *out_interface = std::make_shared<ISaveDataInfoReader>(system, save_data_controller,
-    rb.Push(ResultSuccess);
+                                                           FileSys::SaveDataSpaceId::Temporary);
-    rb.PushIpcInterface<ISaveDataInfoReader>(system, save_data_controller,
-                                             FileSys::SaveDataSpaceId::TemporaryStorage);
+    R_SUCCEED();
 }
-void FSP_SRV::WriteSaveDataFileSystemExtraDataBySaveDataAttribute(HLERequestContext& ctx) {
+Result FSP_SRV::WriteSaveDataFileSystemExtraDataBySaveDataAttribute() {
    LOG_WARNING(Service_FS, "(STUBBED) called.");
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute(HLERequestContext& ctx) {
+Result FSP_SRV::ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute(
-    IPC::RequestParser rp{ctx};
+    FileSys::SaveDataSpaceId space_id, FileSys::SaveDataAttribute attribute,
+    InBuffer<BufferAttr_HipcMapAlias> mask_buffer, OutBuffer<BufferAttr_HipcMapAlias> out_buffer) {
-    struct Parameters {
-        FileSys::SaveDataSpaceId space_id;
-        FileSys::SaveDataAttribute attribute;
-    };
-    const auto parameters = rp.PopRaw<Parameters>();
    // Stub this to None for now, backend needs an impl to read/write the SaveDataExtraData
-    constexpr auto flags = static_cast<u32>(FileSys::SaveDataFlags::None);
+    // In an earlier version of the code, this was returned as an out argument, but this is not
+    // correct
+    [[maybe_unused]] constexpr auto flags = static_cast<u32>(FileSys::SaveDataFlags::None);
    LOG_WARNING(Service_FS,
-                "(STUBBED) called, flags={}, space_id={}, attribute.title_id={:016X}\n"
+                "(STUBBED) called, flags={}, space_id={}, attribute.program_id={:016X}\n"
                "attribute.user_id={:016X}{:016X}, attribute.save_id={:016X}\n"
                "attribute.type={}, attribute.rank={}, attribute.index={}",
-                flags, parameters.space_id, parameters.attribute.title_id,
+                flags, space_id, attribute.program_id, attribute.user_id[1], attribute.user_id[0],
-                parameters.attribute.user_id[1], parameters.attribute.user_id[0],
+                attribute.system_save_data_id, attribute.type, attribute.rank, attribute.index);
-                parameters.attribute.save_id, parameters.attribute.type, parameters.attribute.rank,
-                parameters.attribute.index);
+    R_SUCCEED();
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(ResultSuccess);
-    rb.Push(flags);
 }
-void FSP_SRV::OpenDataStorageByCurrentProcess(HLERequestContext& ctx) {
+Result FSP_SRV::OpenDataStorageByCurrentProcess(OutInterface<IStorage> out_interface) {
    LOG_DEBUG(Service_FS, "called");
    if (!romfs) {
        auto current_romfs = romfs_controller->OpenRomFSCurrentProcess();
        if (!current_romfs) {
            // TODO (bunnei): Find the right error code to use here
-            LOG_CRITICAL(Service_FS, "no file system interface available!");
+            LOG_CRITICAL(Service_FS, "No file system interface available!");
-            IPC::ResponseBuilder rb{ctx, 2};
+            R_RETURN(ResultUnknown);
-            rb.Push(ResultUnknown);
-            return;
        }
        romfs = current_romfs;
    }
-    auto storage = std::make_shared<IStorage>(system, romfs);
+    *out_interface = std::make_shared<IStorage>(system, romfs);
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IStorage>(std::move(storage));
 }
-void FSP_SRV::OpenDataStorageByDataId(HLERequestContext& ctx) {
+Result FSP_SRV::OpenDataStorageByDataId(OutInterface<IStorage> out_interface,
-    IPC::RequestParser rp{ctx};
+                                        FileSys::StorageId storage_id, u32 unknown, u64 title_id) {
-    const auto storage_id = rp.PopRaw<FileSys::StorageId>();
-    const auto unknown = rp.PopRaw<u32>();
-    const auto title_id = rp.PopRaw<u64>();
    LOG_DEBUG(Service_FS, "called with storage_id={:02X}, unknown={:08X}, title_id={:016X}",
              storage_id, unknown, title_id);
@@ -592,19 +362,15 @@ void FSP_SRV::OpenDataStorageByDataId(HLERequestContext& ctx) {
        const auto archive = FileSys::SystemArchive::SynthesizeSystemArchive(title_id);
        if (archive != nullptr) {
-            IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+            *out_interface = std::make_shared<IStorage>(system, archive);
-            rb.Push(ResultSuccess);
+            R_SUCCEED();
-            rb.PushIpcInterface(std::make_shared<IStorage>(system, archive));
-            return;
        }
        // TODO(DarkLordZach): Find the right error code to use here
        LOG_ERROR(Service_FS,
-                  "could not open data storage with title_id={:016X}, storage_id={:02X}", title_id,
+                  "Could not open data storage with title_id={:016X}, storage_id={:02X}", title_id,
                  storage_id);
-        IPC::ResponseBuilder rb{ctx, 2};
+        R_RETURN(ResultUnknown);
-        rb.Push(ResultUnknown);
-        return;
    }
    const FileSys::PatchManager pm{title_id, fsc, content_provider};
@@ -614,28 +380,20 @@ void FSP_SRV::OpenDataStorageByDataId(HLERequestContext& ctx) {
    auto storage = std::make_shared<IStorage>(
        system, pm.PatchRomFS(base.get(), std::move(data), FileSys::ContentRecordType::Data));
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    *out_interface = std::move(storage);
-    rb.Push(ResultSuccess);
+    R_SUCCEED();
-    rb.PushIpcInterface<IStorage>(std::move(storage));
 }
-void FSP_SRV::OpenPatchDataStorageByCurrentProcess(HLERequestContext& ctx) {
+Result FSP_SRV::OpenPatchDataStorageByCurrentProcess(OutInterface<IStorage> out_interface,
-    IPC::RequestParser rp{ctx};
+                                                     FileSys::StorageId storage_id, u64 title_id) {
+    LOG_WARNING(Service_FS, "(STUBBED) called with storage_id={:02X}, title_id={:016X}", storage_id,
-    const auto storage_id = rp.PopRaw<FileSys::StorageId>();
+                title_id);
-    const auto title_id = rp.PopRaw<u64>();
-    LOG_DEBUG(Service_FS, "called with storage_id={:02X}, title_id={:016X}", storage_id, title_id);
+    R_RETURN(FileSys::ResultTargetNotFound);
-    IPC::ResponseBuilder rb{ctx, 2};
-    rb.Push(FileSys::ResultTargetNotFound);
 }
-void FSP_SRV::OpenDataStorageWithProgramIndex(HLERequestContext& ctx) {
+Result FSP_SRV::OpenDataStorageWithProgramIndex(OutInterface<IStorage> out_interface,
-    IPC::RequestParser rp{ctx};
+                                                u8 program_index) {
-    const auto program_index = rp.PopRaw<u8>();
    LOG_DEBUG(Service_FS, "called, program_index={}", program_index);
    auto patched_romfs = romfs_controller->OpenPatchedRomFSWithProgramIndex(
@@ -643,123 +401,80 @@ void FSP_SRV::OpenDataStorageWithProgramIndex(HLERequestContext& ctx) {
    if (!patched_romfs) {
        // TODO: Find the right error code to use here
-        LOG_ERROR(Service_FS, "could not open storage with program_index={}", program_index);
+        LOG_ERROR(Service_FS, "Could not open storage with program_index={}", program_index);
+        R_RETURN(ResultUnknown);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultUnknown);
-        return;
    }
-    auto storage = std::make_shared<IStorage>(system, std::move(patched_romfs));
+    *out_interface = std::make_shared<IStorage>(system, std::move(patched_romfs));
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IStorage>(std::move(storage));
 }
-void FSP_SRV::DisableAutoSaveDataCreation(HLERequestContext& ctx) {
+Result FSP_SRV::DisableAutoSaveDataCreation() {
    LOG_DEBUG(Service_FS, "called");
    save_data_controller->SetAutoCreate(false);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::SetGlobalAccessLogMode(HLERequestContext& ctx) {
+Result FSP_SRV::SetGlobalAccessLogMode(AccessLogMode access_log_mode_) {
-    IPC::RequestParser rp{ctx};
+    LOG_DEBUG(Service_FS, "called, access_log_mode={}", access_log_mode_);
-    access_log_mode = rp.PopEnum<AccessLogMode>();
-    LOG_DEBUG(Service_FS, "called, access_log_mode={}", access_log_mode);
+    access_log_mode = access_log_mode_;
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::GetGlobalAccessLogMode(HLERequestContext& ctx) {
+Result FSP_SRV::GetGlobalAccessLogMode(Out<AccessLogMode> out_access_log_mode) {
    LOG_DEBUG(Service_FS, "called");
-    IPC::ResponseBuilder rb{ctx, 3};
+    *out_access_log_mode = access_log_mode;
-    rb.Push(ResultSuccess);
-    rb.PushEnum(access_log_mode);
-}
-void FSP_SRV::OutputAccessLogToSdCard(HLERequestContext& ctx) {
+    R_SUCCEED();
-    const auto raw = ctx.ReadBufferCopy();
+}
-    auto log = Common::StringFromFixedZeroTerminatedBuffer(
-        reinterpret_cast<const char*>(raw.data()), raw.size());
+Result FSP_SRV::OutputAccessLogToSdCard(InBuffer<BufferAttr_HipcMapAlias> log_message_buffer) {
    LOG_DEBUG(Service_FS, "called");
+    auto log = Common::StringFromFixedZeroTerminatedBuffer(
+        reinterpret_cast<const char*>(log_message_buffer.data()), log_message_buffer.size());
    reporter.SaveFSAccessLog(log);
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::GetProgramIndexForAccessLog(HLERequestContext& ctx) {
+Result FSP_SRV::GetProgramIndexForAccessLog(Out<AccessLogVersion> out_access_log_version,
-    LOG_DEBUG(Service_FS, "called");
+                                            Out<u32> out_access_log_program_index) {
+    LOG_DEBUG(Service_FS, "(STUBBED) called");
+    *out_access_log_version = AccessLogVersion::Latest;
+    *out_access_log_program_index = access_log_program_index;
-    IPC::ResponseBuilder rb{ctx, 4};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
-    rb.PushEnum(AccessLogVersion::Latest);
-    rb.Push(access_log_program_index);
 }
-void FSP_SRV::FlushAccessLogOnSdCard(HLERequestContext& ctx) {
+Result FSP_SRV::FlushAccessLogOnSdCard() {
    LOG_DEBUG(Service_FS, "(STUBBED) called");
-    IPC::ResponseBuilder rb{ctx, 2};
+    R_SUCCEED();
-    rb.Push(ResultSuccess);
 }
-void FSP_SRV::GetCacheStorageSize(HLERequestContext& ctx) {
+Result FSP_SRV::GetCacheStorageSize(s32 index, Out<s64> out_data_size, Out<s64> out_journal_size) {
-    IPC::RequestParser rp{ctx};
-    const auto index{rp.Pop<s32>()};
    LOG_WARNING(Service_FS, "(STUBBED) called with index={}", index);
-    IPC::ResponseBuilder rb{ctx, 6};
+    *out_data_size = 0;
-    rb.Push(ResultSuccess);
+    *out_journal_size = 0;
-    rb.Push(s64{0});
-    rb.Push(s64{0});
-}
-class IMultiCommitManager final : public ServiceFramework<IMultiCommitManager> {
-public:
-    explicit IMultiCommitManager(Core::System& system_)
-        : ServiceFramework{system_, "IMultiCommitManager"} {
-        static const FunctionInfo functions[] = {
-            {1, &IMultiCommitManager::Add, "Add"},
-            {2, &IMultiCommitManager::Commit, "Commit"},
-        };
-        RegisterHandlers(functions);
-    }
-private:
+    R_SUCCEED();
-    FileSys::VirtualFile backend;
+}
-    void Add(HLERequestContext& ctx) {
-        LOG_WARNING(Service_FS, "(STUBBED) called");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-    void Commit(HLERequestContext& ctx) {
-        LOG_WARNING(Service_FS, "(STUBBED) called");
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
-    }
-};
-void FSP_SRV::OpenMultiCommitManager(HLERequestContext& ctx) {
+Result FSP_SRV::OpenMultiCommitManager(OutInterface<IMultiCommitManager> out_interface) {
    LOG_DEBUG(Service_FS, "called");
-    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    *out_interface = std::make_shared<IMultiCommitManager>(system);
-    rb.Push(ResultSuccess);
-    rb.PushIpcInterface<IMultiCommitManager>(std::make_shared<IMultiCommitManager>(system));
+    R_SUCCEED();
 }
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp/fsp_srv.h b/src/core/hle/service/filesystem/fsp/fsp_srv.h
index 59406e6f9..ee67f6bc1 100644
--- a/src/core/hle/service/filesystem/fsp/fsp_srv.h
+++ b/src/core/hle/service/filesystem/fsp/fsp_srv.h
@@ -4,6 +4,9 @@
 #pragma once
 #include <memory>
+#include "core/file_sys/fs_save_data_types.h"
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/filesystem/fsp/fsp_types.h"
 #include "core/hle/service/service.h"
 namespace Core {
@@ -20,6 +23,11 @@ namespace Service::FileSystem {
 class RomFsController;
 class SaveDataController;
+class IFileSystem;
+class ISaveDataInfoReader;
+class IStorage;
+class IMultiCommitManager;
 enum class AccessLogVersion : u32 {
    V7_0_0 = 2,
@@ -38,30 +46,46 @@ public:
    ~FSP_SRV() override;
 private:
-    void SetCurrentProcess(HLERequestContext& ctx);
+    Result SetCurrentProcess(ClientProcessId pid);
-    void OpenFileSystemWithPatch(HLERequestContext& ctx);
+    Result OpenFileSystemWithPatch(OutInterface<IFileSystem> out_interface,
-    void OpenSdCardFileSystem(HLERequestContext& ctx);
+                                   FileSystemProxyType type, u64 open_program_id);
-    void CreateSaveDataFileSystem(HLERequestContext& ctx);
+    Result OpenSdCardFileSystem(OutInterface<IFileSystem> out_interface);
-    void CreateSaveDataFileSystemBySystemSaveDataId(HLERequestContext& ctx);
+    Result CreateSaveDataFileSystem(FileSys::SaveDataCreationInfo save_create_struct,
-    void OpenSaveDataFileSystem(HLERequestContext& ctx);
+                                    FileSys::SaveDataAttribute save_struct, u128 uid);
-    void OpenSaveDataFileSystemBySystemSaveDataId(HLERequestContext& ctx);
+    Result CreateSaveDataFileSystemBySystemSaveDataId(
-    void OpenReadOnlySaveDataFileSystem(HLERequestContext& ctx);
+        FileSys::SaveDataCreationInfo save_create_struct, FileSys::SaveDataAttribute save_struct);
-    void OpenSaveDataInfoReaderBySaveDataSpaceId(HLERequestContext& ctx);
+    Result OpenSaveDataFileSystem(OutInterface<IFileSystem> out_interface,
-    void OpenSaveDataInfoReaderOnlyCacheStorage(HLERequestContext& ctx);
+                                  FileSys::SaveDataSpaceId space_id,
-    void WriteSaveDataFileSystemExtraDataBySaveDataAttribute(HLERequestContext& ctx);
+                                  FileSys::SaveDataAttribute attribute);
-    void ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute(HLERequestContext& ctx);
+    Result OpenSaveDataFileSystemBySystemSaveDataId(OutInterface<IFileSystem> out_interface,
-    void OpenDataStorageByCurrentProcess(HLERequestContext& ctx);
+                                                    FileSys::SaveDataSpaceId space_id,
-    void OpenDataStorageByDataId(HLERequestContext& ctx);
+                                                    FileSys::SaveDataAttribute attribute);
-    void OpenPatchDataStorageByCurrentProcess(HLERequestContext& ctx);
+    Result OpenReadOnlySaveDataFileSystem(OutInterface<IFileSystem> out_interface,
-    void OpenDataStorageWithProgramIndex(HLERequestContext& ctx);
+                                          FileSys::SaveDataSpaceId space_id,
-    void DisableAutoSaveDataCreation(HLERequestContext& ctx);
+                                          FileSys::SaveDataAttribute attribute);
-    void SetGlobalAccessLogMode(HLERequestContext& ctx);
+    Result OpenSaveDataInfoReaderBySaveDataSpaceId(OutInterface<ISaveDataInfoReader> out_interface,
-    void GetGlobalAccessLogMode(HLERequestContext& ctx);
+                                                   FileSys::SaveDataSpaceId space);
-    void OutputAccessLogToSdCard(HLERequestContext& ctx);
+    Result OpenSaveDataInfoReaderOnlyCacheStorage(OutInterface<ISaveDataInfoReader> out_interface);
-    void FlushAccessLogOnSdCard(HLERequestContext& ctx);
+    Result WriteSaveDataFileSystemExtraDataBySaveDataAttribute();
-    void GetProgramIndexForAccessLog(HLERequestContext& ctx);
+    Result ReadSaveDataFileSystemExtraDataWithMaskBySaveDataAttribute(
-    void OpenMultiCommitManager(HLERequestContext& ctx);
+        FileSys::SaveDataSpaceId space_id, FileSys::SaveDataAttribute attribute,
-    void GetCacheStorageSize(HLERequestContext& ctx);
+        InBuffer<BufferAttr_HipcMapAlias> mask_buffer,
+        OutBuffer<BufferAttr_HipcMapAlias> out_buffer);
+    Result OpenDataStorageByCurrentProcess(OutInterface<IStorage> out_interface);
+    Result OpenDataStorageByDataId(OutInterface<IStorage> out_interface,
+                                   FileSys::StorageId storage_id, u32 unknown, u64 title_id);
+    Result OpenPatchDataStorageByCurrentProcess(OutInterface<IStorage> out_interface,
+                                                FileSys::StorageId storage_id, u64 title_id);
+    Result OpenDataStorageWithProgramIndex(OutInterface<IStorage> out_interface, u8 program_index);
+    Result DisableAutoSaveDataCreation();
+    Result SetGlobalAccessLogMode(AccessLogMode access_log_mode_);
+    Result GetGlobalAccessLogMode(Out<AccessLogMode> out_access_log_mode);
+    Result OutputAccessLogToSdCard(InBuffer<BufferAttr_HipcMapAlias> log_message_buffer);
+    Result FlushAccessLogOnSdCard();
+    Result GetProgramIndexForAccessLog(Out<AccessLogVersion> out_access_log_version,
+                                       Out<u32> out_access_log_program_index);
+    Result OpenMultiCommitManager(OutInterface<IMultiCommitManager> out_interface);
+    Result GetCacheStorageSize(s32 index, Out<s64> out_data_size, Out<s64> out_journal_size);
    FileSystemController& fsc;
    const FileSys::ContentProvider& content_provider;
diff --git a/src/core/hle/service/filesystem/fsp/fsp_util.h b/src/core/hle/service/filesystem/fsp/fsp_types.h
index 253f866db..294da6a2d 100644
--- a/src/core/hle/service/filesystem/fsp/fsp_util.h
+++ b/src/core/hle/service/filesystem/fsp/fsp_types.h
@@ -7,6 +7,18 @@
 namespace Service::FileSystem {
+enum class FileSystemProxyType : u8 {
+    Code = 0,
+    Rom = 1,
+    Logo = 2,
+    Control = 3,
+    Manual = 4,
+    Meta = 5,
+    Data = 6,
+    Package = 7,
+    RegisteredUpdate = 8,
+};
 struct SizeGetter {
    std::function<u64()> get_free_size;
    std::function<u64()> get_total_size;
diff --git a/src/core/hle/service/psc/ovln/ovln_types.h b/src/core/hle/service/psc/ovln/ovln_types.h
new file mode 100644
index 000000000..343b05dcc
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/ovln_types.h
@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "common/bit_field.h"
+#include "common/common_types.h"
+namespace Service::PSC {
+using OverlayNotification = std::array<u64, 0x10>;
+static_assert(sizeof(OverlayNotification) == 0x80, "OverlayNotification has incorrect size");
+union MessageFlags {
+    u64 raw;
+    BitField<0, 8, u64> message_type;
+    BitField<8, 8, u64> queue_type;
+};
+static_assert(sizeof(MessageFlags) == 0x8, "MessageFlags has incorrect size");
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/receiver.cpp b/src/core/hle/service/psc/ovln/receiver.cpp
new file mode 100644
index 000000000..85f62816d
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/receiver.cpp
@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/psc/ovln/receiver.h"
+namespace Service::PSC {
+IReceiver::IReceiver(Core::System& system_) : ServiceFramework{system_, "IReceiver"} {
+    // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "AddSource"},
+            {1, nullptr, "RemoveSource"},
+            {2, nullptr, "GetReceiveEventHandle"},
+            {3, nullptr, "Receive"},
+            {4, nullptr, "ReceiveWithTick"},
+        };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IReceiver::~IReceiver() = default;
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/receiver.h b/src/core/hle/service/psc/ovln/receiver.h
new file mode 100644
index 000000000..c47a4ff7e
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/receiver.h
@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class IReceiver final : public ServiceFramework<IReceiver> {
+public:
+    explicit IReceiver(Core::System& system_);
+    ~IReceiver() override;
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/receiver_service.cpp b/src/core/hle/service/psc/ovln/receiver_service.cpp
new file mode 100644
index 000000000..bb988e905
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/receiver_service.cpp
@@ -0,0 +1,28 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/psc/ovln/receiver.h"
+#include "core/hle/service/psc/ovln/receiver_service.h"
+namespace Service::PSC {
+IReceiverService::IReceiverService(Core::System& system_) : ServiceFramework{system_, "ovln:rcv"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IReceiverService::OpenReceiver>, "OpenReceiver"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IReceiverService::~IReceiverService() = default;
+Result IReceiverService::OpenReceiver(Out<SharedPointer<IReceiver>> out_receiver) {
+    LOG_DEBUG(Service_PSC, "called");
+    *out_receiver = std::make_shared<IReceiver>(system);
+    R_SUCCEED();
+}
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/receiver_service.h b/src/core/hle/service/psc/ovln/receiver_service.h
new file mode 100644
index 000000000..b3b31ba4a
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/receiver_service.h
@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class IReceiver;
+class IReceiverService final : public ServiceFramework<IReceiverService> {
+public:
+    explicit IReceiverService(Core::System& system_);
+    ~IReceiverService() override;
+private:
+    Result OpenReceiver(Out<SharedPointer<IReceiver>> out_receiver);
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/sender.cpp b/src/core/hle/service/psc/ovln/sender.cpp
new file mode 100644
index 000000000..3227a56f2
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/sender.cpp
@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/psc/ovln/sender.h"
+namespace Service::PSC {
+ISender::ISender(Core::System& system_) : ServiceFramework{system_, "ISender"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&ISender::Send>, "Send"},
+        {1, nullptr, "GetUnreceivedMessageCount"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+ISender::~ISender() = default;
+Result ISender::Send(const OverlayNotification& notification, MessageFlags flags) {
+    std::string data;
+    for (const auto m : notification) {
+        data += fmt::format("{:016X} ", m);
+    }
+    LOG_WARNING(Service_PSC, "(STUBBED) called, flags={} notification={}", flags.raw, data);
+    R_SUCCEED();
+}
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/sender.h b/src/core/hle/service/psc/ovln/sender.h
new file mode 100644
index 000000000..c1575428e
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/sender.h
@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/psc/ovln/ovln_types.h"
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class ISender final : public ServiceFramework<ISender> {
+public:
+    explicit ISender(Core::System& system_);
+    ~ISender() override;
+private:
+    Result Send(const OverlayNotification& notification, MessageFlags flags);
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/sender_service.cpp b/src/core/hle/service/psc/ovln/sender_service.cpp
new file mode 100644
index 000000000..18d2c83a3
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/sender_service.cpp
@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/psc/ovln/sender.h"
+#include "core/hle/service/psc/ovln/sender_service.h"
+namespace Service::PSC {
+ISenderService::ISenderService(Core::System& system_) : ServiceFramework{system_, "ovln:snd"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&ISenderService::OpenSender>, "OpenSender"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+ISenderService::~ISenderService() = default;
+Result ISenderService::OpenSender(Out<SharedPointer<ISender>> out_sender, u32 sender_id,
+                                  std::array<u64, 2> data) {
+    LOG_WARNING(Service_PSC, "(STUBBED) called, sender_id={}, data={:016X} {:016X}", sender_id,
+                data[0], data[1]);
+    *out_sender = std::make_shared<ISender>(system);
+    R_SUCCEED();
+}
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/ovln/sender_service.h b/src/core/hle/service/psc/ovln/sender_service.h
new file mode 100644
index 000000000..10027701f
--- /dev/null
+++ b/src/core/hle/service/psc/ovln/sender_service.h
@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class ISender;
+class ISenderService final : public ServiceFramework<ISenderService> {
+public:
+    explicit ISenderService(Core::System& system_);
+    ~ISenderService() override;
+private:
+    Result OpenSender(Out<SharedPointer<ISender>> out_sender, u32 sender_id,
+                      std::array<u64, 2> data);
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_control.cpp b/src/core/hle/service/psc/pm_control.cpp
new file mode 100644
index 000000000..7dedb7662
--- /dev/null
+++ b/src/core/hle/service/psc/pm_control.cpp
@@ -0,0 +1,28 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/psc/pm_control.h"
+namespace Service::PSC {
+IPmControl::IPmControl(Core::System& system_) : ServiceFramework{system_, "psc:c"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "Initialize"},
+        {1, nullptr, "DispatchRequest"},
+        {2, nullptr, "GetResult"},
+        {3, nullptr, "GetState"},
+        {4, nullptr, "Cancel"},
+        {5, nullptr, "PrintModuleInformation"},
+        {6, nullptr, "GetModuleInformation"},
+        {10, nullptr, "AcquireStateLock"},
+        {11, nullptr, "HasStateLock"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IPmControl::~IPmControl() = default;
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_control.h b/src/core/hle/service/psc/pm_control.h
new file mode 100644
index 000000000..e0ae2f39c
--- /dev/null
+++ b/src/core/hle/service/psc/pm_control.h
@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class IPmControl final : public ServiceFramework<IPmControl> {
+public:
+    explicit IPmControl(Core::System& system_);
+    ~IPmControl() override;
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_module.cpp b/src/core/hle/service/psc/pm_module.cpp
new file mode 100644
index 000000000..74dc7ed4e
--- /dev/null
+++ b/src/core/hle/service/psc/pm_module.cpp
@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/psc/pm_module.h"
+namespace Service::PSC {
+IPmModule::IPmModule(Core::System& system_) : ServiceFramework{system_, "IPmModule"} {
+    // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "Initialize"},
+            {1, nullptr, "GetRequest"},
+            {2, nullptr, "Acknowledge"},
+            {3, nullptr, "Finalize"},
+            {4, nullptr, "AcknowledgeEx"},
+        };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IPmModule::~IPmModule() = default;
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_module.h b/src/core/hle/service/psc/pm_module.h
new file mode 100644
index 000000000..b3a2d2584
--- /dev/null
+++ b/src/core/hle/service/psc/pm_module.h
@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class IPmModule final : public ServiceFramework<IPmModule> {
+public:
+    explicit IPmModule(Core::System& system_);
+    ~IPmModule() override;
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_service.cpp b/src/core/hle/service/psc/pm_service.cpp
new file mode 100644
index 000000000..c4e0ad228
--- /dev/null
+++ b/src/core/hle/service/psc/pm_service.cpp
@@ -0,0 +1,28 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/psc/pm_module.h"
+#include "core/hle/service/psc/pm_service.h"
+namespace Service::PSC {
+IPmService::IPmService(Core::System& system_) : ServiceFramework{system_, "psc:m"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, D<&IPmService::GetPmModule>, "GetPmModule"},
+    };
+    // clang-format on
+    RegisterHandlers(functions);
+}
+IPmService::~IPmService() = default;
+Result IPmService::GetPmModule(Out<SharedPointer<IPmModule>> out_module) {
+    LOG_DEBUG(Service_PSC, "called");
+    *out_module = std::make_shared<IPmModule>(system);
+    R_SUCCEED();
+}
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/pm_service.h b/src/core/hle/service/psc/pm_service.h
new file mode 100644
index 000000000..08e14c6f8
--- /dev/null
+++ b/src/core/hle/service/psc/pm_service.h
@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#include "core/hle/service/cmif_types.h"
+#include "core/hle/service/service.h"
+namespace Service::PSC {
+class IPmModule;
+class IPmService final : public ServiceFramework<IPmService> {
+public:
+    explicit IPmService(Core::System& system_);
+    ~IPmService() override;
+private:
+    Result GetPmModule(Out<SharedPointer<IPmModule>> out_module);
+};
+} // namespace Service::PSC
diff --git a/src/core/hle/service/psc/psc.cpp b/src/core/hle/service/psc/psc.cpp
index 44310756b..e1762d694 100644
--- a/src/core/hle/service/psc/psc.cpp
+++ b/src/core/hle/service/psc/psc.cpp
@@ -1,11 +1,10 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
-#include <memory>
+#include "core/hle/service/psc/ovln/receiver_service.h"
+#include "core/hle/service/psc/ovln/sender_service.h"
-#include "common/logging/log.h"
+#include "core/hle/service/psc/pm_control.h"
-#include "core/core.h"
+#include "core/hle/service/psc/pm_service.h"
-#include "core/hle/service/ipc_helpers.h"
 #include "core/hle/service/psc/psc.h"
 #include "core/hle/service/psc/time/manager.h"
 #include "core/hle/service/psc/time/power_state_service.h"
@@ -15,71 +14,13 @@
 namespace Service::PSC {
-class IPmControl final : public ServiceFramework<IPmControl> {
-public:
-    explicit IPmControl(Core::System& system_) : ServiceFramework{system_, "psc:c"} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, nullptr, "Initialize"},
-            {1, nullptr, "DispatchRequest"},
-            {2, nullptr, "GetResult"},
-            {3, nullptr, "GetState"},
-            {4, nullptr, "Cancel"},
-            {5, nullptr, "PrintModuleInformation"},
-            {6, nullptr, "GetModuleInformation"},
-            {10, nullptr, "AcquireStateLock"},
-            {11, nullptr, "HasStateLock"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-    }
-};
-class IPmModule final : public ServiceFramework<IPmModule> {
-public:
-    explicit IPmModule(Core::System& system_) : ServiceFramework{system_, "IPmModule"} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, nullptr, "Initialize"},
-            {1, nullptr, "GetRequest"},
-            {2, nullptr, "Acknowledge"},
-            {3, nullptr, "Finalize"},
-            {4, nullptr, "AcknowledgeEx"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-    }
-};
-class IPmService final : public ServiceFramework<IPmService> {
-public:
-    explicit IPmService(Core::System& system_) : ServiceFramework{system_, "psc:m"} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {0, &IPmService::GetPmModule, "GetPmModule"},
-        };
-        // clang-format on
-        RegisterHandlers(functions);
-    }
-private:
-    void GetPmModule(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_PSC, "called");
-        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
-        rb.Push(ResultSuccess);
-        rb.PushIpcInterface<IPmModule>(system);
-    }
-};
 void LoopProcess(Core::System& system) {
    auto server_manager = std::make_unique<ServerManager>(system);
    server_manager->RegisterNamedService("psc:c", std::make_shared<IPmControl>(system));
    server_manager->RegisterNamedService("psc:m", std::make_shared<IPmService>(system));
+    server_manager->RegisterNamedService("ovln:rcv", std::make_shared<IReceiverService>(system));
+    server_manager->RegisterNamedService("ovln:snd", std::make_shared<ISenderService>(system));
    auto time = std::make_shared<Time::TimeManager>(system);
diff --git a/src/core/hle/service/psc/psc.h b/src/core/hle/service/psc/psc.h
index 459137f42..c83d07ca8 100644
--- a/src/core/hle/service/psc/psc.h
+++ b/src/core/hle/service/psc/psc.h
@@ -7,10 +7,6 @@ namespace Core {
 class System;
 }
-namespace Service::SM {
-class ServiceManager;
-}
 namespace Service::PSC {
 void LoopProcess(Core::System& system);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.cpp b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
index 0031fa5fb..3f9698d6b 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
@@ -261,7 +261,9 @@ void DefineEntryPoint(const IR::Program& program, EmitContext& ctx, Id main) {
    case Stage::Geometry:
        execution_model = spv::ExecutionModel::Geometry;
        ctx.AddCapability(spv::Capability::Geometry);
-        ctx.AddCapability(spv::Capability::GeometryStreams);
+        if (ctx.profile.support_geometry_streams) {
+            ctx.AddCapability(spv::Capability::GeometryStreams);
+        }
        switch (ctx.runtime_info.input_topology) {
        case InputTopology::Points:
            ctx.AddExecutionMode(main, spv::ExecutionMode::InputPoints);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_special.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
index 9f7b6bb4b..f60da758e 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
@@ -129,7 +129,9 @@ void EmitEmitVertex(EmitContext& ctx, const IR::Value& stream) {
    if (ctx.runtime_info.convert_depth_mode && !ctx.profile.support_native_ndc) {
        ConvertDepthMode(ctx);
    }
-    if (stream.IsImmediate()) {
+    if (!ctx.profile.support_geometry_streams) {
+        throw NotImplementedException("Geometry streams");
+    } else if (stream.IsImmediate()) {
        ctx.OpEmitStreamVertex(ctx.Def(stream));
    } else {
        LOG_WARNING(Shader_SPIRV, "Stream is not immediate");
@@ -140,7 +142,9 @@ void EmitEmitVertex(EmitContext& ctx, const IR::Value& stream) {
 }
 void EmitEndPrimitive(EmitContext& ctx, const IR::Value& stream) {
-    if (stream.IsImmediate()) {
+    if (!ctx.profile.support_geometry_streams) {
+        throw NotImplementedException("Geometry streams");
+    } else if (stream.IsImmediate()) {
        ctx.OpEndStreamPrimitive(ctx.Def(stream));
    } else {
        LOG_WARNING(Shader_SPIRV, "Stream is not immediate");
diff --git a/src/shader_recompiler/profile.h b/src/shader_recompiler/profile.h
index 7578d41cc..90e46bb1b 100644
--- a/src/shader_recompiler/profile.h
+++ b/src/shader_recompiler/profile.h
@@ -44,6 +44,7 @@ struct Profile {
    bool support_gl_derivative_control{};
    bool support_scaled_attributes{};
    bool support_multi_viewport{};
+    bool support_geometry_streams{};
    bool warp_size_potentially_larger_than_guest{};
diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
index 20f7a9702..d34b585d6 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
@@ -352,6 +352,7 @@ PipelineCache::PipelineCache(Tegra::MaxwellDeviceMemoryManager& device_memory_,
        .support_native_ndc = device.IsExtDepthClipControlSupported(),
        .support_scaled_attributes = !device.MustEmulateScaledFormats(),
        .support_multi_viewport = device.SupportsMultiViewport(),
+        .support_geometry_streams = device.AreTransformFeedbackGeometryStreamsSupported(),
        .warp_size_potentially_larger_than_guest = device.IsWarpSizePotentiallyBiggerThanGuest(),
diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index d7216d349..b94924a58 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -1297,10 +1297,6 @@ u64 Device::GetDeviceMemoryUsage() const {
 }
 void Device::CollectPhysicalMemoryInfo() {
-    // Account for resolution scaling in memory limits
-    const size_t normal_memory = 6_GiB;
-    const size_t scaler_memory = 1_GiB * Settings::values.resolution_info.ScaleUp(1);
    // Calculate limits using memory budget
    VkPhysicalDeviceMemoryBudgetPropertiesEXT budget{};
    budget.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_BUDGET_PROPERTIES_EXT;
@@ -1331,7 +1327,15 @@ void Device::CollectPhysicalMemoryInfo() {
    if (!is_integrated) {
        const u64 reserve_memory = std::min<u64>(device_access_memory / 8, 1_GiB);
        device_access_memory -= reserve_memory;
-        device_access_memory = std::min<u64>(device_access_memory, normal_memory + scaler_memory);
+        if (Settings::values.vram_usage_mode.GetValue() != Settings::VramUsageMode::Aggressive) {
+            // Account for resolution scaling in memory limits
+            const size_t normal_memory = 6_GiB;
+            const size_t scaler_memory = 1_GiB * Settings::values.resolution_info.ScaleUp(1);
+            device_access_memory =
+                std::min<u64>(device_access_memory, normal_memory + scaler_memory);
+        }
        return;
    }
    const s64 available_memory = static_cast<s64>(device_access_memory - device_initial_usage);
diff --git a/src/video_core/vulkan_common/vulkan_device.h b/src/video_core/vulkan_common/vulkan_device.h
index a2ec26697..e3abe8ddf 100644
--- a/src/video_core/vulkan_common/vulkan_device.h
+++ b/src/video_core/vulkan_common/vulkan_device.h
@@ -499,6 +499,11 @@ public:
        return extensions.transform_feedback;
    }
+    /// Returns true if the device supports VK_EXT_transform_feedback properly.
+    bool AreTransformFeedbackGeometryStreamsSupported() const {
+        return features.transform_feedback.geometryStreams;
+    }
    /// Returns true if the device supports VK_EXT_custom_border_color.
    bool IsExtCustomBorderColorSupported() const {
        return extensions.custom_border_color;
diff --git a/src/yuzu/configuration/shared_translation.cpp b/src/yuzu/configuration/shared_translation.cpp
index d138b53c8..0549e8ae4 100644
--- a/src/yuzu/configuration/shared_translation.cpp
+++ b/src/yuzu/configuration/shared_translation.cpp
@@ -164,6 +164,11 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QWidget* parent) {
           "the emulator to decompress to an intermediate format any card supports, RGBA8.\n"
           "This option recompresses RGBA8 to either the BC1 or BC3 format, saving VRAM but "
           "negatively affecting image quality."));
+    INSERT(Settings, vram_usage_mode, tr("VRAM Usage Mode:"),
+           tr("Selects whether the emulator should prefer to conserve memory or make maximum usage "
+              "of available video memory for performance. Has no effect on integrated graphics. "
+              "Aggressive mode may severely impact the performance of other applications such as "
+              "recording software."));
    INSERT(
        Settings, vsync_mode, tr("VSync Mode:"),
        tr("FIFO (VSync) does not drop frames or exhibit tearing but is limited by the screen "
@@ -315,6 +320,11 @@ std::unique_ptr<ComboboxTranslationMap> ComboboxEnumeration(QWidget* parent) {
             PAIR(AstcRecompression, Bc1, tr("BC1 (Low quality)")),
             PAIR(AstcRecompression, Bc3, tr("BC3 (Medium quality)")),
         }});
+    translations->insert({Settings::EnumMetadata<Settings::VramUsageMode>::Index(),
+                          {
+                              PAIR(VramUsageMode, Conservative, tr("Conservative")),
+                              PAIR(VramUsageMode, Aggressive, tr("Aggressive")),
+                          }});
    translations->insert({Settings::EnumMetadata<Settings::RendererBackend>::Index(),
                          {
 #ifdef HAS_OPENGL
diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index b2ae3db52..c0c0a19b8 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -2325,15 +2325,15 @@ void GMainWindow::OnGameListOpenFolder(u64 program_id, GameListOpenTarget target
            ASSERT(user_id);
            const auto user_save_data_path = FileSys::SaveDataFactory::GetFullPath(
-                {}, vfs_nand_dir, FileSys::SaveDataSpaceId::NandUser,
+                {}, vfs_nand_dir, FileSys::SaveDataSpaceId::User, FileSys::SaveDataType::Account,
-                FileSys::SaveDataType::SaveData, program_id, user_id->AsU128(), 0);
+                program_id, user_id->AsU128(), 0);
            path = Common::FS::ConcatPathSafe(nand_dir, user_save_data_path);
        } else {
            // Device save data
            const auto device_save_data_path = FileSys::SaveDataFactory::GetFullPath(
-                {}, vfs_nand_dir, FileSys::SaveDataSpaceId::NandUser,
+                {}, vfs_nand_dir, FileSys::SaveDataSpaceId::User, FileSys::SaveDataType::Account,
-                FileSys::SaveDataType::SaveData, program_id, {}, 0);
+                program_id, {}, 0);
            path = Common::FS::ConcatPathSafe(nand_dir, device_save_data_path);
        }
@@ -2674,7 +2674,7 @@ void GMainWindow::RemoveCacheStorage(u64 program_id) {
        vfs->OpenDirectory(Common::FS::PathToUTF8String(nand_dir), FileSys::OpenMode::Read);
    const auto cache_storage_path = FileSys::SaveDataFactory::GetFullPath(
-        {}, vfs_nand_dir, FileSys::SaveDataSpaceId::NandUser, FileSys::SaveDataType::CacheStorage,
+        {}, vfs_nand_dir, FileSys::SaveDataSpaceId::User, FileSys::SaveDataType::Cache,
        0 /* program_id */, {}, 0);
    const auto path = Common::FS::ConcatPathSafe(nand_dir, cache_storage_path);
@@ -3010,9 +3010,6 @@ bool GMainWindow::MakeShortcutIcoPath(const u64 program_id, const std::string_vi
 void GMainWindow::OnGameListCreateShortcut(u64 program_id, const std::string& game_path,
                                           GameListShortcutTarget target) {
-    std::string game_title;
-    QString qt_game_title;
-    std::filesystem::path out_icon_path;
    // Get path to yuzu executable
    const QStringList args = QApplication::arguments();
    std::filesystem::path yuzu_command = args[0].toStdString();
@@ -3029,48 +3026,51 @@ void GMainWindow::OnGameListCreateShortcut(u64 program_id, const std::string& ga
        shortcut_path =
            QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation).toStdString();
    }
-    // Icon path and title
-    if (std::filesystem::exists(shortcut_path)) {
+    if (!std::filesystem::exists(shortcut_path)) {
-        // Get title from game file
+        GMainWindow::CreateShortcutMessagesGUI(
-        const FileSys::PatchManager pm{program_id, system->GetFileSystemController(),
+            this, GMainWindow::CREATE_SHORTCUT_MSGBOX_ERROR,
-                                       system->GetContentProvider()};
+            QString::fromStdString(shortcut_path.generic_string()));
-        const auto control = pm.GetControlMetadata();
+        LOG_ERROR(Frontend, "Invalid shortcut target {}", shortcut_path.generic_string());
-        const auto loader =
+        return;
-            Loader::GetLoader(*system, vfs->OpenFile(game_path, FileSys::OpenMode::Read));
+    }
-        game_title = fmt::format("{:016X}", program_id);
-        if (control.first != nullptr) {
+    // Get title from game file
-            game_title = control.first->GetApplicationName();
+    const FileSys::PatchManager pm{program_id, system->GetFileSystemController(),
-        } else {
+                                   system->GetContentProvider()};
-            loader->ReadTitle(game_title);
+    const auto control = pm.GetControlMetadata();
-        }
+    const auto loader =
-        // Delete illegal characters from title
+        Loader::GetLoader(*system, vfs->OpenFile(game_path, FileSys::OpenMode::Read));
-        const std::string illegal_chars = "<>:\"/\\|?*.";
+    std::string game_title = fmt::format("{:016X}", program_id);
-        for (auto it = game_title.rbegin(); it != game_title.rend(); ++it) {
+    if (control.first != nullptr) {
-            if (illegal_chars.find(*it) != std::string::npos) {
+        game_title = control.first->GetApplicationName();
-                game_title.erase(it.base() - 1);
+    } else {
-            }
+        loader->ReadTitle(game_title);
-        }
+    }
-        qt_game_title = QString::fromStdString(game_title);
+    // Delete illegal characters from title
-        // Get icon from game file
+    const std::string illegal_chars = "<>:\"/\\|?*.";
-        std::vector<u8> icon_image_file{};
+    for (auto it = game_title.rbegin(); it != game_title.rend(); ++it) {
-        if (control.second != nullptr) {
+        if (illegal_chars.find(*it) != std::string::npos) {
-            icon_image_file = control.second->ReadAllBytes();
+            game_title.erase(it.base() - 1);
-        } else if (loader->ReadIcon(icon_image_file) != Loader::ResultStatus::Success) {
-            LOG_WARNING(Frontend, "Could not read icon from {:s}", game_path);
        }
-        QImage icon_data =
+    }
-            QImage::fromData(icon_image_file.data(), static_cast<int>(icon_image_file.size()));
+    const QString qt_game_title = QString::fromStdString(game_title);
-        if (GMainWindow::MakeShortcutIcoPath(program_id, game_title, out_icon_path)) {
+    // Get icon from game file
-            if (!SaveIconToFile(out_icon_path, icon_data)) {
+    std::vector<u8> icon_image_file{};
-                LOG_ERROR(Frontend, "Could not write icon to file");
+    if (control.second != nullptr) {
-            }
+        icon_image_file = control.second->ReadAllBytes();
+    } else if (loader->ReadIcon(icon_image_file) != Loader::ResultStatus::Success) {
+        LOG_WARNING(Frontend, "Could not read icon from {:s}", game_path);
+    }
+    QImage icon_data =
+        QImage::fromData(icon_image_file.data(), static_cast<int>(icon_image_file.size()));
+    std::filesystem::path out_icon_path;
+    if (GMainWindow::MakeShortcutIcoPath(program_id, game_title, out_icon_path)) {
+        if (!SaveIconToFile(out_icon_path, icon_data)) {
+            LOG_ERROR(Frontend, "Could not write icon to file");
        }
-    } else {
-        GMainWindow::CreateShortcutMessagesGUI(this, GMainWindow::CREATE_SHORTCUT_MSGBOX_ERROR,
-                                               qt_game_title);
-        LOG_ERROR(Frontend, "Invalid shortcut target");
-        return;
    }
 #if defined(__linux__)
    // Special case for AppImages
    // Warn once if we are making a shortcut to a volatile AppImage