19 files changed, 528 insertions, 327 deletions

diff --git a/src/core/hle/service/audio/audctl.cpp b/src/core/hle/service/audio/audctl.cpp
new file mode 100644
index 000000000..37c3fdcac
--- /dev/null
+++ b/src/core/hle/service/audio/audctl.cpp
@@ -0,0 +1,45 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audctl.h"
+
+namespace Service::Audio {
+
+AudCtl::AudCtl() : ServiceFramework{"audctl"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetTargetVolume"},
+        {1, nullptr, "SetTargetVolume"},
+        {2, nullptr, "GetTargetVolumeMin"},
+        {3, nullptr, "GetTargetVolumeMax"},
+        {4, nullptr, "IsTargetMute"},
+        {5, nullptr, "SetTargetMute"},
+        {6, nullptr, "IsTargetConnected"},
+        {7, nullptr, "SetDefaultTarget"},
+        {8, nullptr, "GetDefaultTarget"},
+        {9, nullptr, "GetAudioOutputMode"},
+        {10, nullptr, "SetAudioOutputMode"},
+        {11, nullptr, "SetForceMutePolicy"},
+        {12, nullptr, "GetForceMutePolicy"},
+        {13, nullptr, "GetOutputModeSetting"},
+        {14, nullptr, "SetOutputModeSetting"},
+        {15, nullptr, "SetOutputTarget"},
+        {16, nullptr, "SetInputTargetForceEnabled"},
+        {17, nullptr, "SetHeadphoneOutputLevelMode"},
+        {18, nullptr, "GetHeadphoneOutputLevelMode"},
+        {19, nullptr, "AcquireAudioVolumeUpdateEventForPlayReport"},
+        {20, nullptr, "AcquireAudioOutputDeviceUpdateEventForPlayReport"},
+        {21, nullptr, "GetAudioOutputTargetForPlayReport"},
+        {22, nullptr, "NotifyHeadphoneVolumeWarningDisplayedEvent"},
+        {23, nullptr, "SetSystemOutputMasterVolume"},
+        {24, nullptr, "GetSystemOutputMasterVolume"},
+        {25, nullptr, "GetAudioVolumeDataForPlayReport"},
+        {26, nullptr, "UpdateHeadphoneSettings"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audctl.h b/src/core/hle/service/audio/audctl.h
new file mode 100644
index 000000000..ed837bdf2
--- /dev/null
+++ b/src/core/hle/service/audio/audctl.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudCtl final : public ServiceFramework<AudCtl> {
+public:
+    explicit AudCtl();
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/auddbg.cpp b/src/core/hle/service/audio/auddbg.cpp
new file mode 100644
index 000000000..b08c21a20
--- /dev/null
+++ b/src/core/hle/service/audio/auddbg.cpp
@@ -0,0 +1,20 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/auddbg.h"
+
+namespace Service::Audio {
+
+AudDbg::AudDbg(const char* name) : ServiceFramework{name} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendForDebug"},
+        {1, nullptr, "RequestResumeForDebug"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/auddbg.h b/src/core/hle/service/audio/auddbg.h
new file mode 100644
index 000000000..a2f540b75
--- /dev/null
+++ b/src/core/hle/service/audio/auddbg.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudDbg final : public ServiceFramework<AudDbg> {
+public:
+    explicit AudDbg(const char* name);
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audin_a.cpp b/src/core/hle/service/audio/audin_a.cpp
new file mode 100644
index 000000000..a70d5bca4
--- /dev/null
+++ b/src/core/hle/service/audio/audin_a.cpp
@@ -0,0 +1,22 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audin_a.h"
+
+namespace Service::Audio {
+
+AudInA::AudInA() : ServiceFramework{"audin:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioIns"},
+        {1, nullptr, "RequestResumeAudioIns"},
+        {2, nullptr, "GetAudioInsProcessMasterVolume"},
+        {3, nullptr, "SetAudioInsProcessMasterVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audin_a.h b/src/core/hle/service/audio/audin_a.h
new file mode 100644
index 000000000..e4c75510f
--- /dev/null
+++ b/src/core/hle/service/audio/audin_a.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudInA final : public ServiceFramework<AudInA> {
+public:
+    explicit AudInA();
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audio.cpp b/src/core/hle/service/audio/audio.cpp
index d231e91e1..6b5e15633 100644
--- a/src/core/hle/service/audio/audio.cpp
+++ b/src/core/hle/service/audio/audio.cpp
@@ -2,10 +2,16 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "core/hle/service/audio/audctl.h"
+#include "core/hle/service/audio/auddbg.h"
+#include "core/hle/service/audio/audin_a.h"
 #include "core/hle/service/audio/audin_u.h"
 #include "core/hle/service/audio/audio.h"
+#include "core/hle/service/audio/audout_a.h"
 #include "core/hle/service/audio/audout_u.h"
+#include "core/hle/service/audio/audrec_a.h"
 #include "core/hle/service/audio/audrec_u.h"
+#include "core/hle/service/audio/audren_a.h"
 #include "core/hle/service/audio/audren_u.h"
 #include "core/hle/service/audio/codecctl.h"
 #include "core/hle/service/audio/hwopus.h"
@@ -13,12 +19,22 @@
 namespace Service::Audio {
 
 void InstallInterfaces(SM::ServiceManager& service_manager) {
+    std::make_shared<AudCtl>()->InstallAsService(service_manager);
+    std::make_shared<AudOutA>()->InstallAsService(service_manager);
     std::make_shared<AudOutU>()->InstallAsService(service_manager);
+    std::make_shared<AudInA>()->InstallAsService(service_manager);
     std::make_shared<AudInU>()->InstallAsService(service_manager);
+    std::make_shared<AudRecA>()->InstallAsService(service_manager);
     std::make_shared<AudRecU>()->InstallAsService(service_manager);
+    std::make_shared<AudRenA>()->InstallAsService(service_manager);
     std::make_shared<AudRenU>()->InstallAsService(service_manager);
     std::make_shared<CodecCtl>()->InstallAsService(service_manager);
     std::make_shared<HwOpus>()->InstallAsService(service_manager);
+
+    std::make_shared<AudDbg>("audin:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>("audout:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>("audrec:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>("audren:d")->InstallAsService(service_manager);
 }
 
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_a.cpp b/src/core/hle/service/audio/audout_a.cpp
new file mode 100644
index 000000000..bf8d40157
--- /dev/null
+++ b/src/core/hle/service/audio/audout_a.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audout_a.h"
+
+namespace Service::Audio {
+
+AudOutA::AudOutA() : ServiceFramework{"audout:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioOuts"},
+        {1, nullptr, "RequestResumeAudioOuts"},
+        {2, nullptr, "GetAudioOutsProcessMasterVolume"},
+        {3, nullptr, "SetAudioOutsProcessMasterVolume"},
+        {4, nullptr, "GetAudioOutsProcessRecordVolume"},
+        {5, nullptr, "SetAudioOutsProcessRecordVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_a.h b/src/core/hle/service/audio/audout_a.h
new file mode 100644
index 000000000..91a069152
--- /dev/null
+++ b/src/core/hle/service/audio/audout_a.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudOutA final : public ServiceFramework<AudOutA> {
+public:
+    explicit AudOutA();
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_u.cpp b/src/core/hle/service/audio/audout_u.cpp
index 1dcd84d98..108a7c6eb 100644
--- a/src/core/hle/service/audio/audout_u.cpp
+++ b/src/core/hle/service/audio/audout_u.cpp
@@ -4,9 +4,10 @@
 
 #include <array>
 #include <vector>
+
+#include "audio_core/codec.h"
 #include "common/logging/log.h"
-#include "core/core_timing.h"
-#include "core/core_timing_util.h"
+#include "core/core.h"
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/hle_ipc.h"
@@ -14,17 +15,21 @@
 
 namespace Service::Audio {
 
-/// Switch sample rate frequency
-constexpr u32 sample_rate{48000};
-/// TODO(st4rk): dynamic number of channels, as I think Switch has support
-/// to more audio channels (probably when Docked I guess)
-constexpr u32 audio_channels{2};
-/// TODO(st4rk): find a proper value for the audio_ticks
-constexpr u64 audio_ticks{static_cast<u64>(CoreTiming::BASE_CLOCK_RATE / 500)};
+namespace ErrCodes {
+enum {
+    ErrorUnknown = 2,
+    BufferCountExceeded = 8,
+};
+}
+
+constexpr std::array<char, 10> DefaultDevice{{"DeviceOut"}};
+constexpr int DefaultSampleRate{48000};
 
 class IAudioOut final : public ServiceFramework<IAudioOut> {
 public:
-    IAudioOut() : ServiceFramework("IAudioOut"), audio_out_state(AudioState::Stopped) {
+    IAudioOut(AudoutParams audio_params, AudioCore::AudioOut& audio_core)
+        : ServiceFramework("IAudioOut"), audio_params(audio_params), audio_core(audio_core) {
+
         static const FunctionInfo functions[] = {
             {0, &IAudioOut::GetAudioOutState, "GetAudioOutState"},
             {1, &IAudioOut::StartAudioOut, "StartAudioOut"},
@@ -32,66 +37,65 @@ public:
             {3, &IAudioOut::AppendAudioOutBufferImpl, "AppendAudioOutBuffer"},
             {4, &IAudioOut::RegisterBufferEvent, "RegisterBufferEvent"},
             {5, &IAudioOut::GetReleasedAudioOutBufferImpl, "GetReleasedAudioOutBuffer"},
-            {6, nullptr, "ContainsAudioOutBuffer"},
+            {6, &IAudioOut::ContainsAudioOutBuffer, "ContainsAudioOutBuffer"},
             {7, &IAudioOut::AppendAudioOutBufferImpl, "AppendAudioOutBufferAuto"},
             {8, &IAudioOut::GetReleasedAudioOutBufferImpl, "GetReleasedAudioOutBufferAuto"},
-            {9, nullptr, "GetAudioOutBufferCount"},
+            {9, &IAudioOut::GetAudioOutBufferCount, "GetAudioOutBufferCount"},
             {10, nullptr, "GetAudioOutPlayedSampleCount"},
             {11, nullptr, "FlushAudioOutBuffers"},
         };
         RegisterHandlers(functions);
 
         // This is the event handle used to check if the audio buffer was released
-        buffer_event =
-            Kernel::Event::Create(Kernel::ResetType::OneShot, "IAudioOutBufferReleasedEvent");
-
-        // Register event callback to update the Audio Buffer
-        audio_event = CoreTiming::RegisterEvent(
-            "IAudioOut::UpdateAudioBuffersCallback", [this](u64 userdata, int cycles_late) {
-                UpdateAudioBuffersCallback();
-                CoreTiming::ScheduleEvent(audio_ticks - cycles_late, audio_event);
-            });
-
-        // Start the audio event
-        CoreTiming::ScheduleEvent(audio_ticks, audio_event);
-    }
+        buffer_event = Kernel::Event::Create(Kernel::ResetType::Sticky, "IAudioOutBufferReleased");
 
-    ~IAudioOut() {
-        CoreTiming::UnscheduleEvent(audio_event, 0);
+        stream = audio_core.OpenStream(audio_params.sample_rate, audio_params.channel_count,
+                                       "IAudioOut", [=]() { buffer_event->Signal(); });
     }
 
 private:
+    struct AudioBuffer {
+        u64_le next;
+        u64_le buffer;
+        u64_le buffer_capacity;
+        u64_le buffer_size;
+        u64_le offset;
+    };
+    static_assert(sizeof(AudioBuffer) == 0x28, "AudioBuffer is an invalid size");
+
     void GetAudioOutState(Kernel::HLERequestContext& ctx) {
         LOG_DEBUG(Service_Audio, "called");
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
-        rb.Push(static_cast<u32>(audio_out_state));
+        rb.Push(static_cast<u32>(stream->IsPlaying() ? AudioState::Started : AudioState::Stopped));
     }
 
     void StartAudioOut(Kernel::HLERequestContext& ctx) {
-        LOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_DEBUG(Service_Audio, "called");
 
-        // Start audio
-        audio_out_state = AudioState::Started;
+        if (stream->IsPlaying()) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ResultCode(ErrorModule::Audio, ErrCodes::ErrorUnknown));
+            return;
+        }
+
+        audio_core.StartStream(stream);
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
     void StopAudioOut(Kernel::HLERequestContext& ctx) {
-        LOG_WARNING(Service_Audio, "(STUBBED) called");
-
-        // Stop audio
-        audio_out_state = AudioState::Stopped;
+        LOG_DEBUG(Service_Audio, "called");
 
-        queue_keys.clear();
+        audio_core.StopStream(stream);
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
     void RegisterBufferEvent(Kernel::HLERequestContext& ctx) {
-        LOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_DEBUG(Service_Audio, "called");
 
         IPC::ResponseBuilder rb{ctx, 2, 1};
         rb.Push(RESULT_SUCCESS);
@@ -99,101 +103,107 @@ private:
     }
 
     void AppendAudioOutBufferImpl(Kernel::HLERequestContext& ctx) {
-        LOG_WARNING(Service_Audio, "(STUBBED) called");
+        LOG_DEBUG(Service_Audio, "(STUBBED) called {}", ctx.Description());
         IPC::RequestParser rp{ctx};
 
-        const u64 key{rp.Pop<u64>()};
-        queue_keys.insert(queue_keys.begin(), key);
+        const auto& input_buffer{ctx.ReadBuffer()};
+        ASSERT_MSG(input_buffer.size() == sizeof(AudioBuffer),
+                   "AudioBuffer input is an invalid size!");
+        AudioBuffer audio_buffer{};
+        std::memcpy(&audio_buffer, input_buffer.data(), sizeof(AudioBuffer));
+        const u64 tag{rp.Pop<u64>()};
+
+        std::vector<s16> samples(audio_buffer.buffer_size / sizeof(s16));
+        Memory::ReadBlock(audio_buffer.buffer, samples.data(), audio_buffer.buffer_size);
+
+        if (!audio_core.QueueBuffer(stream, tag, std::move(samples))) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ResultCode(ErrorModule::Audio, ErrCodes::BufferCountExceeded));
+        }
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
     void GetReleasedAudioOutBufferImpl(Kernel::HLERequestContext& ctx) {
-        LOG_WARNING(Service_Audio, "(STUBBED) called");
-
-        // TODO(st4rk): This is how libtransistor currently implements the
-        // GetReleasedAudioOutBuffer, it should return the key (a VAddr) to the app and this address
-        // is used to know which buffer should be filled with data and send again to the service
-        // through AppendAudioOutBuffer. Check if this is the proper way to do it.
-        u64 key{0};
-
-        if (queue_keys.size()) {
-            key = queue_keys.back();
-            queue_keys.pop_back();
-        }
+        LOG_DEBUG(Service_Audio, "called {}", ctx.Description());
+        IPC::RequestParser rp{ctx};
+        const u64 max_count{ctx.GetWriteBufferSize() / sizeof(u64)};
+        const auto released_buffers{audio_core.GetTagsAndReleaseBuffers(stream, max_count)};
 
-        ctx.WriteBuffer(&key, sizeof(u64));
+        std::vector<u64> tags{released_buffers};
+        tags.resize(max_count);
+        ctx.WriteBuffer(tags);
 
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
-        // TODO(st4rk): This might be the total of released buffers, needs to be verified on
-        // hardware
-        rb.Push<u32>(static_cast<u32>(queue_keys.size()));
+        rb.Push<u32>(static_cast<u32>(released_buffers.size()));
     }
 
-    void UpdateAudioBuffersCallback() {
-        if (audio_out_state != AudioState::Started) {
-            return;
-        }
-
-        if (queue_keys.empty()) {
-            return;
-        }
+    void ContainsAudioOutBuffer(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+        IPC::RequestParser rp{ctx};
+        const u64 tag{rp.Pop<u64>()};
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(stream->ContainsBuffer(tag));
+    }
 
-        buffer_event->Signal();
+    void GetAudioOutBufferCount(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(static_cast<u32>(stream->GetQueueSize()));
     }
 
-    enum class AudioState : u32 {
-        Started,
-        Stopped,
-    };
+    AudioCore::AudioOut& audio_core;
+    AudioCore::StreamPtr stream;
 
-    /// This is used to trigger the audio event callback that is going to read the samples from the
-    /// audio_buffer list and enqueue the samples using the sink (audio_core).
-    CoreTiming::EventType* audio_event;
+    AudoutParams audio_params{};
 
     /// This is the evend handle used to check if the audio buffer was released
     Kernel::SharedPtr<Kernel::Event> buffer_event;
-
-    /// (st4rk): This is just a temporary workaround for the future implementation. Libtransistor
-    /// uses the key as an address in the App, so we need to return when the
-    /// GetReleasedAudioOutBuffer_1 is called, otherwise we'll run in problems, because
-    /// libtransistor uses the key returned as an pointer.
-    std::vector<u64> queue_keys;
-
-    AudioState audio_out_state;
 };
 
 void AudOutU::ListAudioOutsImpl(Kernel::HLERequestContext& ctx) {
-    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    LOG_DEBUG(Service_Audio, "called");
     IPC::RequestParser rp{ctx};
 
-    constexpr std::array<char, 15> audio_interface{{"AudioInterface"}};
-    ctx.WriteBuffer(audio_interface);
+    ctx.WriteBuffer(DefaultDevice);
 
     IPC::ResponseBuilder rb = rp.MakeBuilder(3, 0, 0);
 
     rb.Push(RESULT_SUCCESS);
-    // TODO(st4rk): We're currently returning only one audio interface (stringlist size). However,
-    // it's highly possible to have more than one interface (despite that libtransistor requires
-    // only one).
-    rb.Push<u32>(1);
+    rb.Push<u32>(1); // Amount of audio devices
 }
 
 void AudOutU::OpenAudioOutImpl(Kernel::HLERequestContext& ctx) {
-    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    LOG_DEBUG(Service_Audio, "called");
 
-    if (!audio_out_interface) {
-        audio_out_interface = std::make_shared<IAudioOut>();
+    ctx.WriteBuffer(DefaultDevice);
+    IPC::RequestParser rp{ctx};
+    auto params{rp.PopRaw<AudoutParams>()};
+    if (params.channel_count <= 2) {
+        // Mono does not exist for audout
+        params.channel_count = 2;
+    } else {
+        params.channel_count = 6;
     }
+    if (!params.sample_rate) {
+        params.sample_rate = DefaultSampleRate;
+    }
+
+    // TODO(bunnei): Support more than one IAudioOut interface. When we add this, ListAudioOutsImpl
+    // will likely need to be updated as well.
+    ASSERT_MSG(!audio_out_interface, "Unimplemented");
+    audio_out_interface = std::make_shared<IAudioOut>(params, *audio_core);
 
     IPC::ResponseBuilder rb{ctx, 6, 0, 1};
     rb.Push(RESULT_SUCCESS);
-    rb.Push<u32>(sample_rate);
-    rb.Push<u32>(audio_channels);
-    rb.Push<u32>(static_cast<u32>(PcmFormat::Int16));
-    rb.Push<u32>(0); // This field is unknown
+    rb.Push<u32>(DefaultSampleRate);
+    rb.Push<u32>(params.channel_count);
+    rb.Push<u32>(static_cast<u32>(AudioCore::Codec::PcmFormat::Int16));
+    rb.Push<u32>(static_cast<u32>(AudioState::Stopped));
     rb.PushIpcInterface<Audio::IAudioOut>(audio_out_interface);
 }
 
@@ -203,6 +213,7 @@ AudOutU::AudOutU() : ServiceFramework("audout:u") {
                                              {2, &AudOutU::ListAudioOutsImpl, "ListAudioOutsAuto"},
                                              {3, &AudOutU::OpenAudioOutImpl, "OpenAudioOutAuto"}};
     RegisterHandlers(functions);
+    audio_core = std::make_unique<AudioCore::AudioOut>();
 }
 
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audout_u.h b/src/core/hle/service/audio/audout_u.h
index 847d86aa6..fd491f65d 100644
--- a/src/core/hle/service/audio/audout_u.h
+++ b/src/core/hle/service/audio/audout_u.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include "audio_core/audio_out.h"
 #include "core/hle/service/service.h"
 
 namespace Kernel {
@@ -12,6 +13,18 @@ class HLERequestContext;
 
 namespace Service::Audio {
 
+struct AudoutParams {
+    s32_le sample_rate;
+    u16_le channel_count;
+    INSERT_PADDING_BYTES(2);
+};
+static_assert(sizeof(AudoutParams) == 0x8, "AudoutParams is an invalid size");
+
+enum class AudioState : u32 {
+    Started,
+    Stopped,
+};
+
 class IAudioOut;
 
 class AudOutU final : public ServiceFramework<AudOutU> {
@@ -21,19 +34,10 @@ public:
 
 private:
     std::shared_ptr<IAudioOut> audio_out_interface;
+    std::unique_ptr<AudioCore::AudioOut> audio_core;
 
     void ListAudioOutsImpl(Kernel::HLERequestContext& ctx);
     void OpenAudioOutImpl(Kernel::HLERequestContext& ctx);
-
-    enum class PcmFormat : u32 {
-        Invalid = 0,
-        Int8 = 1,
-        Int16 = 2,
-        Int24 = 3,
-        Int32 = 4,
-        PcmFloat = 5,
-        Adpcm = 6,
-    };
 };
 
 } // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_a.cpp b/src/core/hle/service/audio/audrec_a.cpp
new file mode 100644
index 000000000..016eabf53
--- /dev/null
+++ b/src/core/hle/service/audio/audrec_a.cpp
@@ -0,0 +1,20 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audrec_a.h"
+
+namespace Service::Audio {
+
+AudRecA::AudRecA() : ServiceFramework{"audrec:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendFinalOutputRecorders"},
+        {1, nullptr, "RequestResumeFinalOutputRecorders"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audrec_a.h b/src/core/hle/service/audio/audrec_a.h
new file mode 100644
index 000000000..9685047f2
--- /dev/null
+++ b/src/core/hle/service/audio/audrec_a.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudRecA final : public ServiceFramework<AudRecA> {
+public:
+    explicit AudRecA();
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audren_a.cpp b/src/core/hle/service/audio/audren_a.cpp
new file mode 100644
index 000000000..616ff3dc4
--- /dev/null
+++ b/src/core/hle/service/audio/audren_a.cpp
@@ -0,0 +1,26 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audren_a.h"
+
+namespace Service::Audio {
+
+AudRenA::AudRenA() : ServiceFramework{"audren:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioRenderers"},
+        {1, nullptr, "RequestResumeAudioRenderers"},
+        {2, nullptr, "GetAudioRenderersProcessMasterVolume"},
+        {3, nullptr, "SetAudioRenderersProcessMasterVolume"},
+        {4, nullptr, "RegisterAppletResourceUserId"},
+        {5, nullptr, "UnregisterAppletResourceUserId"},
+        {6, nullptr, "GetAudioRenderersProcessRecordVolume"},
+        {7, nullptr, "SetAudioRenderersProcessRecordVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audren_a.h b/src/core/hle/service/audio/audren_a.h
new file mode 100644
index 000000000..5ecf2e184
--- /dev/null
+++ b/src/core/hle/service/audio/audren_a.h
@@ -0,0 +1,16 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+class AudRenA final : public ServiceFramework<AudRenA> {
+public:
+    explicit AudRenA();
+};
+
+} // namespace Service::Audio
diff --git a/src/core/hle/service/audio/audren_u.cpp b/src/core/hle/service/audio/audren_u.cpp
index 6aed9e2fa..f99304de5 100644
--- a/src/core/hle/service/audio/audren_u.cpp
+++ b/src/core/hle/service/audio/audren_u.cpp
@@ -15,13 +15,10 @@
 
 namespace Service::Audio {
 
-/// TODO(bunnei): Find a proper value for the audio_ticks
-constexpr u64 audio_ticks{static_cast<u64>(CoreTiming::BASE_CLOCK_RATE / 200)};
-
 class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
 public:
-    explicit IAudioRenderer(AudioRendererParameter audren_params)
-        : ServiceFramework("IAudioRenderer"), worker_params(audren_params) {
+    explicit IAudioRenderer(AudioCore::AudioRendererParameter audren_params)
+        : ServiceFramework("IAudioRenderer") {
         static const FunctionInfo functions[] = {
             {0, nullptr, "GetAudioRendererSampleRate"},
             {1, nullptr, "GetAudioRendererSampleCount"},
@@ -39,21 +36,8 @@ public:
         RegisterHandlers(functions);
 
         system_event =
-            Kernel::Event::Create(Kernel::ResetType::OneShot, "IAudioRenderer:SystemEvent");
-
-        // Register event callback to update the Audio Buffer
-        audio_event = CoreTiming::RegisterEvent(
-            "IAudioRenderer::UpdateAudioCallback", [this](u64 userdata, int cycles_late) {
-                UpdateAudioCallback();
-                CoreTiming::ScheduleEvent(audio_ticks - cycles_late, audio_event);
-            });
-
-        // Start the audio event
-        CoreTiming::ScheduleEvent(audio_ticks, audio_event);
-        voice_status_list.resize(worker_params.voice_count);
-    }
-    ~IAudioRenderer() {
-        CoreTiming::UnscheduleEvent(audio_event, 0);
+            Kernel::Event::Create(Kernel::ResetType::Sticky, "IAudioRenderer:SystemEvent");
+        renderer = std::make_unique<AudioCore::AudioRenderer>(audren_params, system_event);
     }
 
 private:
@@ -62,60 +46,9 @@ private:
     }
 
     void RequestUpdateAudioRenderer(Kernel::HLERequestContext& ctx) {
-        UpdateDataHeader config{};
-        auto buf = ctx.ReadBuffer();
-        std::memcpy(&config, buf.data(), sizeof(UpdateDataHeader));
-        u32 memory_pool_count = worker_params.effect_count + (worker_params.voice_count * 4);
-
-        std::vector<MemoryPoolInfo> mem_pool_info(memory_pool_count);
-        std::memcpy(mem_pool_info.data(),
-                    buf.data() + sizeof(UpdateDataHeader) + config.behavior_size,
-                    memory_pool_count * sizeof(MemoryPoolInfo));
-
-        std::vector<VoiceInfo> voice_info(worker_params.voice_count);
-        std::memcpy(voice_info.data(),
-                    buf.data() + sizeof(UpdateDataHeader) + config.behavior_size +
-                        config.memory_pools_size + config.voice_resource_size,
-                    worker_params.voice_count * sizeof(VoiceInfo));
-
-        UpdateDataHeader response_data{worker_params};
-
-        ASSERT(ctx.GetWriteBufferSize() == response_data.total_size);
-
-        std::vector<u8> output(response_data.total_size);
-        std::memcpy(output.data(), &response_data, sizeof(UpdateDataHeader));
-        std::vector<MemoryPoolEntry> memory_pool(memory_pool_count);
-        for (unsigned i = 0; i < memory_pool.size(); i++) {
-            if (mem_pool_info[i].pool_state == MemoryPoolStates::RequestAttach)
-                memory_pool[i].state = MemoryPoolStates::Attached;
-            else if (mem_pool_info[i].pool_state == MemoryPoolStates::RequestDetach)
-                memory_pool[i].state = MemoryPoolStates::Detached;
-        }
-        std::memcpy(output.data() + sizeof(UpdateDataHeader), memory_pool.data(),
-                    response_data.memory_pools_size);
-
-        for (unsigned i = 0; i < voice_info.size(); i++) {
-            if (voice_info[i].is_new) {
-                voice_status_list[i].played_sample_count = 0;
-                voice_status_list[i].wave_buffer_consumed = 0;
-            } else if (voice_info[i].play_state == (u8)PlayStates::Started) {
-                for (u32 buff_idx = 0; buff_idx < voice_info[i].wave_buffer_count; buff_idx++) {
-                    voice_status_list[i].played_sample_count +=
-                        (voice_info[i].wave_buffer[buff_idx].end_sample_offset -
-                         voice_info[i].wave_buffer[buff_idx].start_sample_offset) /
-                        2;
-                    voice_status_list[i].wave_buffer_consumed++;
-                }
-            }
-        }
-        std::memcpy(output.data() + sizeof(UpdateDataHeader) + response_data.memory_pools_size,
-                    voice_status_list.data(), response_data.voices_size);
-
-        ctx.WriteBuffer(output);
-
+        ctx.WriteBuffer(renderer->UpdateAudioRenderer(ctx.ReadBuffer()));
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
-
         LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
@@ -136,8 +69,6 @@ private:
     }
 
     void QuerySystemEvent(Kernel::HLERequestContext& ctx) {
-        // system_event->Signal();
-
         IPC::ResponseBuilder rb{ctx, 2, 1};
         rb.Push(RESULT_SUCCESS);
         rb.PushCopyObjects(system_event);
@@ -145,131 +76,8 @@ private:
         LOG_WARNING(Service_Audio, "(STUBBED) called");
     }
 
-    enum class MemoryPoolStates : u32 { // Should be LE
-        Invalid = 0x0,
-        Unknown = 0x1,
-        RequestDetach = 0x2,
-        Detached = 0x3,
-        RequestAttach = 0x4,
-        Attached = 0x5,
-        Released = 0x6,
-    };
-
-    enum class PlayStates : u8 {
-        Started = 0,
-        Stopped = 1,
-    };
-
-    struct MemoryPoolEntry {
-        MemoryPoolStates state;
-        u32_le unknown_4;
-        u32_le unknown_8;
-        u32_le unknown_c;
-    };
-    static_assert(sizeof(MemoryPoolEntry) == 0x10, "MemoryPoolEntry has wrong size");
-
-    struct MemoryPoolInfo {
-        u64_le pool_address;
-        u64_le pool_size;
-        MemoryPoolStates pool_state;
-        INSERT_PADDING_WORDS(3); // Unknown
-    };
-    static_assert(sizeof(MemoryPoolInfo) == 0x20, "MemoryPoolInfo has wrong size");
-
-    struct UpdateDataHeader {
-        UpdateDataHeader() {}
-
-        explicit UpdateDataHeader(const AudioRendererParameter& config) {
-            revision = Common::MakeMagic('R', 'E', 'V', '4'); // 5.1.0 Revision
-            behavior_size = 0xb0;
-            memory_pools_size = (config.effect_count + (config.voice_count * 4)) * 0x10;
-            voices_size = config.voice_count * 0x10;
-            voice_resource_size = 0x0;
-            effects_size = config.effect_count * 0x10;
-            mixes_size = 0x0;
-            sinks_size = config.sink_count * 0x20;
-            performance_manager_size = 0x10;
-            total_size = sizeof(UpdateDataHeader) + behavior_size + memory_pools_size +
-                         voices_size + effects_size + sinks_size + performance_manager_size;
-        }
-
-        u32_le revision;
-        u32_le behavior_size;
-        u32_le memory_pools_size;
-        u32_le voices_size;
-        u32_le voice_resource_size;
-        u32_le effects_size;
-        u32_le mixes_size;
-        u32_le sinks_size;
-        u32_le performance_manager_size;
-        INSERT_PADDING_WORDS(6);
-        u32_le total_size;
-    };
-    static_assert(sizeof(UpdateDataHeader) == 0x40, "UpdateDataHeader has wrong size");
-
-    struct BiquadFilter {
-        u8 enable;
-        INSERT_PADDING_BYTES(1);
-        s16_le numerator[3];
-        s16_le denominator[2];
-    };
-    static_assert(sizeof(BiquadFilter) == 0xc, "BiquadFilter has wrong size");
-
-    struct WaveBuffer {
-        u64_le buffer_addr;
-        u64_le buffer_sz;
-        s32_le start_sample_offset;
-        s32_le end_sample_offset;
-        u8 loop;
-        u8 end_of_stream;
-        u8 sent_to_server;
-        INSERT_PADDING_BYTES(5);
-        u64 context_addr;
-        u64 context_sz;
-        INSERT_PADDING_BYTES(8);
-    };
-    static_assert(sizeof(WaveBuffer) == 0x38, "WaveBuffer has wrong size");
-
-    struct VoiceInfo {
-        u32_le id;
-        u32_le node_id;
-        u8 is_new;
-        u8 is_in_use;
-        u8 play_state;
-        u8 sample_format;
-        u32_le sample_rate;
-        u32_le priority;
-        u32_le sorting_order;
-        u32_le channel_count;
-        float_le pitch;
-        float_le volume;
-        BiquadFilter biquad_filter[2];
-        u32_le wave_buffer_count;
-        u16_le wave_buffer_head;
-        INSERT_PADDING_BYTES(6);
-        u64_le additional_params_addr;
-        u64_le additional_params_sz;
-        u32_le mix_id;
-        u32_le splitter_info_id;
-        WaveBuffer wave_buffer[4];
-        u32_le voice_channel_resource_ids[6];
-        INSERT_PADDING_BYTES(24);
-    };
-    static_assert(sizeof(VoiceInfo) == 0x170, "VoiceInfo is wrong size");
-
-    struct VoiceOutStatus {
-        u64_le played_sample_count;
-        u32_le wave_buffer_consumed;
-        INSERT_PADDING_WORDS(1);
-    };
-    static_assert(sizeof(VoiceOutStatus) == 0x10, "VoiceOutStatus has wrong size");
-
-    /// This is used to trigger the audio event callback.
-    CoreTiming::EventType* audio_event;
-
     Kernel::SharedPtr<Kernel::Event> system_event;
-    AudioRendererParameter worker_params;
-    std::vector<VoiceOutStatus> voice_status_list;
+    std::unique_ptr<AudioCore::AudioRenderer> renderer;
 };
 
 class IAudioDevice final : public ServiceFramework<IAudioDevice> {
@@ -368,7 +176,7 @@ AudRenU::AudRenU() : ServiceFramework("audren:u") {
 
 void AudRenU::OpenAudioRenderer(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<AudioRendererParameter>();
+    auto params = rp.PopRaw<AudioCore::AudioRendererParameter>();
     IPC::ResponseBuilder rb{ctx, 2, 0, 1};
 
     rb.Push(RESULT_SUCCESS);
@@ -379,7 +187,7 @@ void AudRenU::OpenAudioRenderer(Kernel::HLERequestContext& ctx) {
 
 void AudRenU::GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    auto params = rp.PopRaw<AudioRendererParameter>();
+    auto params = rp.PopRaw<AudioCore::AudioRendererParameter>();
 
     u64 buffer_sz = Common::AlignUp(4 * params.unknown_8, 0x40);
     buffer_sz += params.unknown_c * 1024;
diff --git a/src/core/hle/service/audio/audren_u.h b/src/core/hle/service/audio/audren_u.h
index b9b81db4f..14907f8ae 100644
--- a/src/core/hle/service/audio/audren_u.h
+++ b/src/core/hle/service/audio/audren_u.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include "audio_core/audio_renderer.h"
 #include "core/hle/service/service.h"
 
 namespace Kernel {
@@ -12,24 +13,6 @@ class HLERequestContext;
 
 namespace Service::Audio {
 
-struct AudioRendererParameter {
-    u32_le sample_rate;
-    u32_le sample_count;
-    u32_le unknown_8;
-    u32_le unknown_c;
-    u32_le voice_count;
-    u32_le sink_count;
-    u32_le effect_count;
-    u32_le unknown_1c;
-    u8 unknown_20;
-    INSERT_PADDING_BYTES(3);
-    u32_le splitter_count;
-    u32_le unknown_2c;
-    INSERT_PADDING_WORDS(1);
-    u32_le revision;
-};
-static_assert(sizeof(AudioRendererParameter) == 52, "AudioRendererParameter is an invalid size");
-
 class AudRenU final : public ServiceFramework<AudRenU> {
 public:
     explicit AudRenU();
diff --git a/src/core/hle/service/audio/hwopus.cpp b/src/core/hle/service/audio/hwopus.cpp
index 844df382c..371cd4997 100644
--- a/src/core/hle/service/audio/hwopus.cpp
+++ b/src/core/hle/service/audio/hwopus.cpp
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <cstring>
+#include <opus.h>
 #include "common/logging/log.h"
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/hle_ipc.h"
@@ -9,19 +11,142 @@
 
 namespace Service::Audio {
 
+struct OpusDeleter {
+    void operator()(void* ptr) const {
+        operator delete(ptr);
+    }
+};
+
+class IHardwareOpusDecoderManager final : public ServiceFramework<IHardwareOpusDecoderManager> {
+public:
+    IHardwareOpusDecoderManager(std::unique_ptr<OpusDecoder, OpusDeleter> decoder, u32 sample_rate,
+                                u32 channel_count)
+        : ServiceFramework("IHardwareOpusDecoderManager"), decoder(std::move(decoder)),
+          sample_rate(sample_rate), channel_count(channel_count) {
+        static const FunctionInfo functions[] = {
+            {0, &IHardwareOpusDecoderManager::DecodeInterleaved, "DecodeInterleaved"},
+            {1, nullptr, "SetContext"},
+            {2, nullptr, "DecodeInterleavedForMultiStream"},
+            {3, nullptr, "SetContextForMultiStream"},
+            {4, nullptr, "Unknown4"},
+            {5, nullptr, "Unknown5"},
+            {6, nullptr, "Unknown6"},
+            {7, nullptr, "Unknown7"},
+        };
+        RegisterHandlers(functions);
+    }
+
+private:
+    void DecodeInterleaved(Kernel::HLERequestContext& ctx) {
+        u32 consumed = 0;
+        u32 sample_count = 0;
+        std::vector<opus_int16> samples(ctx.GetWriteBufferSize() / sizeof(opus_int16));
+        if (!Decoder_DecodeInterleaved(consumed, sample_count, ctx.ReadBuffer(), samples)) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            // TODO(ogniK): Use correct error code
+            rb.Push(ResultCode(-1));
+            return;
+        }
+        IPC::ResponseBuilder rb{ctx, 4};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(consumed);
+        rb.Push<u32>(sample_count);
+        ctx.WriteBuffer(samples.data(), samples.size() * sizeof(s16));
+    }
+
+    bool Decoder_DecodeInterleaved(u32& consumed, u32& sample_count, const std::vector<u8>& input,
+                                   std::vector<opus_int16>& output) {
+        size_t raw_output_sz = output.size() * sizeof(opus_int16);
+        if (sizeof(OpusHeader) > input.size())
+            return false;
+        OpusHeader hdr{};
+        std::memcpy(&hdr, input.data(), sizeof(OpusHeader));
+        if (sizeof(OpusHeader) + static_cast<u32>(hdr.sz) > input.size()) {
+            return false;
+        }
+        auto frame = input.data() + sizeof(OpusHeader);
+        auto decoded_sample_count = opus_packet_get_nb_samples(
+            frame, static_cast<opus_int32>(input.size() - sizeof(OpusHeader)),
+            static_cast<opus_int32>(sample_rate));
+        if (decoded_sample_count * channel_count * sizeof(u16) > raw_output_sz)
+            return false;
+        auto out_sample_count =
+            opus_decode(decoder.get(), frame, hdr.sz, output.data(),
+                        (static_cast<int>(raw_output_sz / sizeof(s16) / channel_count)), 0);
+        if (out_sample_count < 0)
+            return false;
+        sample_count = out_sample_count;
+        consumed = static_cast<u32>(sizeof(OpusHeader) + hdr.sz);
+        return true;
+    }
+
+    struct OpusHeader {
+        u32_be sz; // Needs to be BE for some odd reason
+        INSERT_PADDING_WORDS(1);
+    };
+    static_assert(sizeof(OpusHeader) == 0x8, "OpusHeader is an invalid size");
+
+    std::unique_ptr<OpusDecoder, OpusDeleter> decoder;
+    u32 sample_rate;
+    u32 channel_count;
+};
+
+static size_t WorkerBufferSize(u32 channel_count) {
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+    return opus_decoder_get_size(static_cast<int>(channel_count));
+}
+
 void HwOpus::GetWorkBufferSize(Kernel::HLERequestContext& ctx) {
-    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    IPC::RequestParser rp{ctx};
+    auto sample_rate = rp.Pop<u32>();
+    auto channel_count = rp.Pop<u32>();
+    ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
+                   sample_rate == 12000 || sample_rate == 8000,
+               "Invalid sample rate");
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+    u32 worker_buffer_sz = static_cast<u32>(WorkerBufferSize(channel_count));
+    LOG_DEBUG(Audio, "called worker_buffer_sz={}", worker_buffer_sz);
+
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(RESULT_SUCCESS);
-    rb.Push<u32>(0x4000);
+    rb.Push<u32>(worker_buffer_sz);
+}
+
+void HwOpus::OpenOpusDecoder(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    auto sample_rate = rp.Pop<u32>();
+    auto channel_count = rp.Pop<u32>();
+    auto buffer_sz = rp.Pop<u32>();
+    LOG_DEBUG(Audio, "called sample_rate={}, channel_count={}, buffer_size={}", sample_rate,
+              channel_count, buffer_sz);
+    ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
+                   sample_rate == 12000 || sample_rate == 8000,
+               "Invalid sample rate");
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+
+    size_t worker_sz = WorkerBufferSize(channel_count);
+    ASSERT_MSG(buffer_sz < worker_sz, "Worker buffer too large");
+    std::unique_ptr<OpusDecoder, OpusDeleter> decoder{
+        static_cast<OpusDecoder*>(operator new(worker_sz))};
+    if (opus_decoder_init(decoder.get(), sample_rate, channel_count)) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        // TODO(ogniK): Use correct error code
+        rb.Push(ResultCode(-1));
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IHardwareOpusDecoderManager>(std::move(decoder), sample_rate,
+                                                     channel_count);
 }
 
 HwOpus::HwOpus() : ServiceFramework("hwopus") {
     static const FunctionInfo functions[] = {
-        {0, nullptr, "Initialize"},
+        {0, &HwOpus::OpenOpusDecoder, "OpenOpusDecoder"},
         {1, &HwOpus::GetWorkBufferSize, "GetWorkBufferSize"},
-        {2, nullptr, "InitializeMultiStream"},
-        {3, nullptr, "GetWorkBufferSizeMultiStream"},
+        {2, nullptr, "OpenOpusDecoderForMultiStream"},
+        {3, nullptr, "GetWorkBufferSizeForMultiStream"},
     };
     RegisterHandlers(functions);
 }
diff --git a/src/core/hle/service/audio/hwopus.h b/src/core/hle/service/audio/hwopus.h
index 090b8c825..5258d59f3 100644
--- a/src/core/hle/service/audio/hwopus.h
+++ b/src/core/hle/service/audio/hwopus.h
@@ -14,6 +14,7 @@ public:
     ~HwOpus() = default;
 
 private:
+    void OpenOpusDecoder(Kernel::HLERequestContext& ctx);
     void GetWorkBufferSize(Kernel::HLERequestContext& ctx);
 };