diff --git a/au4/src/au3wrap/CMakeLists.txt b/au4/src/au3wrap/CMakeLists.txt
index 6275a7f4b312b8126990dc6864a1acfc20a64644..68cc8f094e85ebb52f2a4641060666692159f7d7 100644
--- a/au4/src/au3wrap/CMakeLists.txt
+++ b/au4/src/au3wrap/CMakeLists.txt
@@ -26,13 +26,11 @@ set(MODULE_SRC
     ${CMAKE_CURRENT_LIST_DIR}/au3wrapmodule.h
 
     ${CMAKE_CURRENT_LIST_DIR}/wxtypes_convert.h
-    ${CMAKE_CURRENT_LIST_DIR}/audacity3project.cpp
-    ${CMAKE_CURRENT_LIST_DIR}/audacity3project.h
-    ${CMAKE_CURRENT_LIST_DIR}/audacity3playback.cpp
-    ${CMAKE_CURRENT_LIST_DIR}/audacity3playback.h
+    ${CMAKE_CURRENT_LIST_DIR}/au3project.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/au3project.h
     ${CMAKE_CURRENT_LIST_DIR}/iau3wavepainter.h
-    ${CMAKE_CURRENT_LIST_DIR}/iaudacity3playback.h
-    ${CMAKE_CURRENT_LIST_DIR}/iaudacity3audiooutput.h
+    ${CMAKE_CURRENT_LIST_DIR}/iau3playback.h
+    ${CMAKE_CURRENT_LIST_DIR}/iau3audiooutput.h
 
     ${CMAKE_CURRENT_LIST_DIR}/mocks/au3settingsmock.cpp
     ${CMAKE_CURRENT_LIST_DIR}/mocks/au3settingsmock.h
@@ -49,8 +47,10 @@ set(MODULE_SRC
     ${CMAKE_CURRENT_LIST_DIR}/internal/au3wavepainter.h
     ${CMAKE_CURRENT_LIST_DIR}/internal/WaveformScale.cpp
     ${CMAKE_CURRENT_LIST_DIR}/internal/WaveformScale.h
-    ${CMAKE_CURRENT_LIST_DIR}/internal/audacity3audiooutput.cpp
-    ${CMAKE_CURRENT_LIST_DIR}/internal/audacity3audiooutput.h
+    ${CMAKE_CURRENT_LIST_DIR}/internal/au3playback.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/internal/au3playback.h
+    ${CMAKE_CURRENT_LIST_DIR}/internal/au3audiooutput.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/internal/au3audiooutput.h
     )
 
 # ==================================
diff --git a/au4/src/au3wrap/audacity3project.cpp b/au4/src/au3wrap/au3project.cpp
similarity index 81%
rename from au4/src/au3wrap/audacity3project.cpp
rename to au4/src/au3wrap/au3project.cpp
index ac2826c97be9fd1eea720ab1db2b8b487057ff4d..a81a1b8ee052e60b51ff2f722d0190f5ed071bbe 100644
--- a/au4/src/au3wrap/audacity3project.cpp
+++ b/au4/src/au3wrap/au3project.cpp
@@ -1,4 +1,4 @@
-#include "audacity3project.h"
+#include "au3project.h"
 
 #include "libraries/lib-project/Project.h"
 #include "libraries/lib-project-file-io/ProjectFileIO.h"
@@ -35,26 +35,26 @@ static au::processing::TrackType trackType(const Track* track)
     return au::processing::TrackType::Undefined;
 }
 
-struct au::au3::Audacity3ProjectData
+struct au::au3::Au3ProjectData
 {
     std::shared_ptr<AudacityProject> project;
 
     AudacityProject& projectRef() { return *project.get(); }
 };
 
-Audacity3Project::Audacity3Project()
+Au3Project::Au3Project()
 {
-    m_data = std::make_shared<Audacity3ProjectData>();
+    m_data = std::make_shared<Au3ProjectData>();
 }
 
-std::shared_ptr<Audacity3Project> Audacity3Project::create()
+std::shared_ptr<Au3Project> Au3Project::create()
 {
-    std::shared_ptr<Audacity3Project> p = std::make_shared<Audacity3Project>();
+    std::shared_ptr<Au3Project> p = std::make_shared<Au3Project>();
     p->m_data->project = AudacityProject::Create();
     return p;
 }
 
-bool Audacity3Project::load(const muse::io::path_t& filePath)
+bool Au3Project::load(const muse::io::path_t& filePath)
 {
     auto& projectFileIO = ProjectFileIO::Get(m_data->projectRef());
     std::string sstr = filePath.toStdString();
@@ -70,7 +70,7 @@ bool Audacity3Project::load(const muse::io::path_t& filePath)
     return bParseSuccess;
 }
 
-bool Audacity3Project::save(const muse::io::path_t& filePath, const bool fromSaveAs)
+bool Au3Project::save(const muse::io::path_t& filePath, const bool fromSaveAs)
 {
     //! TODO AU4
     // auto& projectFileIO = ProjectFileIO::Get(m_data->projectRef());
@@ -81,13 +81,13 @@ bool Audacity3Project::save(const muse::io::path_t& filePath, const bool fromSav
     return false;
 }
 
-void Audacity3Project::close()
+void Au3Project::close()
 {
     auto& projectFileIO = ProjectFileIO::Get(m_data->projectRef());
     projectFileIO.CloseProject();
 }
 
-std::string Audacity3Project::title() const
+std::string Au3Project::title() const
 {
     if (!m_data->project) {
         return std::string();
@@ -96,7 +96,7 @@ std::string Audacity3Project::title() const
     return wxToStdSting(m_data->project->GetProjectName());
 }
 
-muse::async::NotifyList<au::processing::Track> Audacity3Project::trackList() const
+muse::async::NotifyList<au::processing::Track> Au3Project::trackList() const
 {
     muse::async::NotifyList<au::processing::Track> au4tracks;
     au4tracks.setNotify(m_trackChangedNotifier.notify());
@@ -116,7 +116,7 @@ muse::async::NotifyList<au::processing::Track> Audacity3Project::trackList() con
     return au4tracks;
 }
 
-muse::async::NotifyList<au::processing::Clip> Audacity3Project::clipList(const au::processing::TrackId& trackId) const
+muse::async::NotifyList<au::processing::Clip> Au3Project::clipList(const au::processing::TrackId& trackId) const
 {
     const WaveTrack* waveTrack = DomAccessor::findWaveTrack(m_data->projectRef(), TrackId(trackId));
     IF_ASSERT_FAILED(waveTrack) {
@@ -134,7 +134,7 @@ muse::async::NotifyList<au::processing::Clip> Audacity3Project::clipList(const a
     return clips;
 }
 
-uintptr_t Audacity3Project::au3ProjectPtr() const
+uintptr_t Au3Project::au3ProjectPtr() const
 {
     return reinterpret_cast<uintptr_t>(m_data->project.get());
 }
diff --git a/au4/src/au3wrap/audacity3project.h b/au4/src/au3wrap/au3project.h
similarity index 68%
rename from au4/src/au3wrap/audacity3project.h
rename to au4/src/au3wrap/au3project.h
index 64612d0af54abb1e15929ba8af1ba85008c70175..bec0d4fb55950b3a8371830dc32111a0dd514cb2 100644
--- a/au4/src/au3wrap/audacity3project.h
+++ b/au4/src/au3wrap/au3project.h
@@ -1,5 +1,5 @@
-#ifndef AU_AU3WRAP_AUDACITY3PROJECT_H
-#define AU_AU3WRAP_AUDACITY3PROJECT_H
+#ifndef AU_AU3WRAP_AU3PROJECT_H
+#define AU_AU3WRAP_AU3PROJECT_H
 
 #include <memory>
 #include <string>
@@ -10,14 +10,14 @@
 #include "processing/dom/track.h"
 
 namespace au::au3 {
-struct Audacity3ProjectData;
-class Audacity3Project
+struct Au3ProjectData;
+class Au3Project
 {
 public:
 
-    Audacity3Project();
+    Au3Project();
 
-    static std::shared_ptr<Audacity3Project> create();
+    static std::shared_ptr<Au3Project> create();
 
     bool load(const muse::io::path_t& filePath);
     bool save(const muse::io::path_t& fileName, const bool fromSaveAs);
@@ -32,9 +32,9 @@ public:
 
 private:
 
-    std::shared_ptr<Audacity3ProjectData> m_data;
+    std::shared_ptr<Au3ProjectData> m_data;
     mutable muse::async::ChangedNotifier<processing::Track> m_trackChangedNotifier;
 };
 }
 
-#endif // AU_AU3WRAP_AUDACITY3PROJECT_H
+#endif // AU_AU3WRAP_AU3PROJECT_H
diff --git a/au4/src/au3wrap/au3wrapmodule.cpp b/au4/src/au3wrap/au3wrapmodule.cpp
index 139dfe386a1b183b6930309a1817e149edc674d9..f297356adb5d3dbed28af84f4191e9ff3cd26552 100644
--- a/au4/src/au3wrap/au3wrapmodule.cpp
+++ b/au4/src/au3wrap/au3wrapmodule.cpp
@@ -29,12 +29,12 @@
 
 #include "mocks/au3settingsmock.h"
 
+#include "modularity/ioc.h"
+
 #include "internal/wxlogwrap.h"
 #include "internal/processinginteraction.h"
 #include "internal/au3wavepainter.h"
-
-#include "modularity/ioc.h"
-#include "audacity3playback.h"
+#include "internal/au3playback.h"
 
 #include "log.h"
 
@@ -48,9 +48,9 @@ std::string Au3WrapModule::moduleName() const
 
 void Au3WrapModule::registerExports()
 {
-    m_playback = std::make_shared<Audacity3Playback>();
+    m_playback = std::make_shared<Au3Playback>();
 
-    ioc()->registerExport<IAudacity3Playback>(moduleName(), m_playback);
+    ioc()->registerExport<IAu3Playback>(moduleName(), m_playback);
     ioc()->registerExport<processing::IProcessingInteraction>(moduleName(), new ProcessingInteraction());
     ioc()->registerExport<IAu3WavePainter>(moduleName(), new Au3WavePainter());
 }
diff --git a/au4/src/au3wrap/au3wrapmodule.h b/au4/src/au3wrap/au3wrapmodule.h
index 55e2e963f07ef4450eb6f08e537ae000ac2c7a31..22b73ecf110ab38100770a19300ad2360171ee68 100644
--- a/au4/src/au3wrap/au3wrapmodule.h
+++ b/au4/src/au3wrap/au3wrapmodule.h
@@ -26,7 +26,7 @@
 
 namespace au::au3 {
 class WxLogWrap;
-class Audacity3Playback;
+class Au3Playback;
 class Au3WrapModule : public muse::modularity::IModuleSetup
 {
 public:
@@ -40,7 +40,7 @@ private:
 
     WxLogWrap* m_wxLog = nullptr;
 
-    std::shared_ptr<Audacity3Playback> m_playback;
+    std::shared_ptr<Au3Playback> m_playback;
 };
 }
 
diff --git a/au4/src/au3wrap/iaudacity3audiooutput.h b/au4/src/au3wrap/iau3audiooutput.h
similarity index 80%
rename from au4/src/au3wrap/iaudacity3audiooutput.h
rename to au4/src/au3wrap/iau3audiooutput.h
index 2500fcd1bb5f03e5a2d4ee05441178beae8b8e2e..0518e7b841ba1637bb9b3d0de1fb2c1e598b89e8 100644
--- a/au4/src/au3wrap/iaudacity3audiooutput.h
+++ b/au4/src/au3wrap/iau3audiooutput.h
@@ -13,10 +13,10 @@
 #include "playback/audiotypes.h"
 
 namespace au::au3 {
-class IAudacity3AudioOutput
+class IAu3AudioOutput
 {
 public:
-    virtual ~IAudacity3AudioOutput() = default;
+    virtual ~IAu3AudioOutput() = default;
 
     virtual muse::async::Promise<float> playbackVolume() const = 0;
     virtual void setPlaybackVolume(float volume) = 0;
@@ -25,7 +25,7 @@ public:
     virtual muse::async::Promise<au::audio::AudioSignalChanges> playbackSignalChanges() const = 0;
 };
 
-using IAudacity3AudioOutputPtr = std::shared_ptr<IAudacity3AudioOutput>;
+using IAu3AudioOutputPtr = std::shared_ptr<IAu3AudioOutput>;
 }
 
 #endif // AU_AU3WRAP_IAUDACITYAUDIOOUTPUT_H
diff --git a/au4/src/au3wrap/iaudacity3playback.h b/au4/src/au3wrap/iau3playback.h
similarity index 64%
rename from au4/src/au3wrap/iaudacity3playback.h
rename to au4/src/au3wrap/iau3playback.h
index 1cddd4c73f07c2b7dfd567140debe6358d6f61fb..d4999b5dd2773676697ada7207b76ca9c85dea13 100644
--- a/au4/src/au3wrap/iaudacity3playback.h
+++ b/au4/src/au3wrap/iau3playback.h
@@ -1,8 +1,8 @@
 /*
 * Audacity: A Digital Audio Editor
 */
-#ifndef AU_AU3WRAP_IAUDACITY3PLAYBACK_H
-#define AU_AU3WRAP_IAUDACITY3PLAYBACK_H
+#ifndef AU_AU3WRAP_IAU3PLAYBACK_H
+#define AU_AU3WRAP_IAU3PLAYBACK_H
 
 #include "global/async/promise.h"
 #include "global/async/channel.h"
@@ -11,14 +11,14 @@
 
 #include "playback/audiotypes.h"
 
-#include "iaudacity3audiooutput.h"
+#include "iau3audiooutput.h"
 
 namespace au::au3 {
-class IAudacity3Playback : MODULE_EXPORT_INTERFACE
+class IAu3Playback : MODULE_EXPORT_INTERFACE
 {
-    INTERFACE_ID(IAudacity3Playback)
+    INTERFACE_ID(IAu3Playback)
 public:
-    virtual ~IAudacity3Playback() = default;
+    virtual ~IAu3Playback() = default;
 
     virtual void play() = 0;
     virtual void seek(const audio::msecs_t newPositionMsecs) = 0;
@@ -33,9 +33,9 @@ public:
     virtual muse::async::Channel<audio::msecs_t> playbackPositionMsecs() const = 0;
     virtual muse::async::Channel<audio::PlaybackStatus> playbackStatusChanged() const = 0;
 
-    virtual std::shared_ptr<IAudacity3AudioOutput> audioOutput() const = 0;
+    virtual std::shared_ptr<IAu3AudioOutput> audioOutput() const = 0;
 };
-using IAudacity3PlaybackPtr = std::shared_ptr<IAudacity3Playback>;
+using IAu3PlaybackPtr = std::shared_ptr<IAu3Playback>;
 }
 
-#endif // AU_AU3WRAP_IAUDACITY3PLAYBACK_H
+#endif // AU_AU3WRAP_IAU3PLAYBACK_H
diff --git a/au4/src/au3wrap/internal/audacity3audiooutput.cpp b/au4/src/au3wrap/internal/au3audiooutput.cpp
similarity index 75%
rename from au4/src/au3wrap/internal/audacity3audiooutput.cpp
rename to au4/src/au3wrap/internal/au3audiooutput.cpp
index 71f33102442e339ed27117e4ed38ae5b8cc610f0..bded98ce0f94c589332d33f29c40ce2b515273e8 100644
--- a/au4/src/au3wrap/internal/audacity3audiooutput.cpp
+++ b/au4/src/au3wrap/internal/au3audiooutput.cpp
@@ -2,7 +2,7 @@
 * Audacity: A Digital Audio Editor
 */
 
-#include "audacity3audiooutput.h"
+#include "au3audiooutput.h"
 
 #include "types/ret.h"
 #include "global/async/async.h"
@@ -15,7 +15,7 @@ using namespace muse;
 using namespace muse::async;
 using namespace au::au3;
 
-muse::async::Promise<au::audio::volume_dbfs_t> Audacity3AudioOutput::playbackVolume() const
+muse::async::Promise<au::audio::volume_dbfs_t> Au3AudioOutput::playbackVolume() const
 {
     return muse::async::Promise<float>([](auto resolve, auto /*reject*/) {
         float inputVolume;
@@ -29,7 +29,7 @@ muse::async::Promise<au::audio::volume_dbfs_t> Audacity3AudioOutput::playbackVol
     });
 }
 
-void Audacity3AudioOutput::setPlaybackVolume(float volume)
+void Au3AudioOutput::setPlaybackVolume(float volume)
 {
     muse::async::Async::call(this, [this, volume]() {
         float inputVolume;
@@ -45,12 +45,12 @@ void Audacity3AudioOutput::setPlaybackVolume(float volume)
     });
 }
 
-muse::async::Channel<au::audio::volume_dbfs_t> Audacity3AudioOutput::playbackVolumeChanged() const
+muse::async::Channel<au::audio::volume_dbfs_t> Au3AudioOutput::playbackVolumeChanged() const
 {
     return m_playbackVolumeChanged;
 }
 
-muse::async::Promise<au::audio::AudioSignalChanges> Audacity3AudioOutput::playbackSignalChanges() const
+muse::async::Promise<au::audio::AudioSignalChanges> Au3AudioOutput::playbackSignalChanges() const
 {
     return muse::async::Promise<audio::AudioSignalChanges>([](auto, auto reject) {
         muse::Ret ret = make_ret(muse::Ret::Code::NotImplemented);
diff --git a/au4/src/au3wrap/internal/audacity3audiooutput.h b/au4/src/au3wrap/internal/au3audiooutput.h
similarity index 67%
rename from au4/src/au3wrap/internal/audacity3audiooutput.h
rename to au4/src/au3wrap/internal/au3audiooutput.h
index 0d71433acd2563362c9cd625b7bbefdd10ee4cea..76e60f0408b883b35101b7367420460995414e0c 100644
--- a/au4/src/au3wrap/internal/audacity3audiooutput.h
+++ b/au4/src/au3wrap/internal/au3audiooutput.h
@@ -2,15 +2,15 @@
 * Audacity: A Digital Audio Editor
 */
 
-#ifndef AU_AU3WRAP_AUDIOOUTPUT_H
-#define AU_AU3WRAP_AUDIOOUTPUT_H
+#ifndef AU_AU3WRAP_AU3AUDIOOUTPUT_H
+#define AU_AU3WRAP_AU3AUDIOOUTPUT_H
 
 #include "global/async/asyncable.h"
 
-#include "../iaudacity3audiooutput.h"
+#include "../iau3audiooutput.h"
 
 namespace au::au3 {
-class Audacity3AudioOutput : public IAudacity3AudioOutput, public muse::async::Asyncable
+class Au3AudioOutput : public IAu3AudioOutput, public muse::async::Asyncable
 {
 public:
     muse::async::Promise<float> playbackVolume() const override;
@@ -24,4 +24,4 @@ private:
 };
 }
 
-#endif // AU_AU3WRAP_AUDIOOUTPUT_H
+#endif // AU_AU3WRAP_AU3AUDIOOUTPUT_H
diff --git a/au4/src/au3wrap/audacity3playback.cpp b/au4/src/au3wrap/internal/au3playback.cpp
similarity index 88%
rename from au4/src/au3wrap/audacity3playback.cpp
rename to au4/src/au3wrap/internal/au3playback.cpp
index a6858fbfd5ef2cd2121dba84e2c7f00524b3edeb..eb77d3b827b88ca2140e4763d0c0d38b20582984 100644
--- a/au4/src/au3wrap/audacity3playback.cpp
+++ b/au4/src/au3wrap/internal/au3playback.cpp
@@ -1,7 +1,7 @@
 /*
 * Audacity: A Digital Audio Editor
 */
-#include "audacity3playback.h"
+#include "au3playback.h"
 
 #include "libraries/lib-time-frequency-selection/SelectedRegion.h"
 #include "libraries/lib-track/Track.h"
@@ -14,18 +14,18 @@
 
 #include "wxtypes_convert.h"
 
-#include "internal/audacity3audiooutput.h"
+#include "internal/au3audiooutput.h"
 
 #include "log.h"
 
 using namespace au::au3;
 
-void Audacity3Playback::init()
+void Au3Playback::init()
 {
-    m_audioOutputPtr = std::make_shared<Audacity3AudioOutput>();
+    m_audioOutputPtr = std::make_shared<Au3AudioOutput>();
 }
 
-void Audacity3Playback::play()
+void Au3Playback::play()
 {
     //! NOTE: copied from ProjectAudioManager::PlayPlayRegion
 
@@ -186,7 +186,7 @@ void Audacity3Playback::play()
     }
 }
 
-void Audacity3Playback::seek(const audio::msecs_t newPositionMsecs)
+void Au3Playback::seek(const audio::msecs_t newPositionMsecs)
 {
     AudacityProject& project = projectRef();
 
@@ -194,7 +194,7 @@ void Audacity3Playback::seek(const audio::msecs_t newPositionMsecs)
     playRegion.SetStart(newPositionMsecs);
 }
 
-void Audacity3Playback::stop()
+void Au3Playback::stop()
 {
     //! NOTE: copied from ProjectAudioManager::Stop
     bool stopStream = true;
@@ -217,7 +217,7 @@ void Audacity3Playback::stop()
     gAudioIO->SetPaused(false);
 }
 
-void Audacity3Playback::pause()
+void Au3Playback::pause()
 {
     if (!canStopAudioStream()) {
         return;
@@ -228,7 +228,7 @@ void Audacity3Playback::pause()
     gAudioIO->SetPaused(true);
 }
 
-void Audacity3Playback::resume()
+void Au3Playback::resume()
 {
     if (!canStopAudioStream()) {
         return;
@@ -239,13 +239,13 @@ void Audacity3Playback::resume()
     gAudioIO->SetPaused(false);
 }
 
-void Audacity3Playback::setDuration(const audio::msecs_t durationMsec)
+void Au3Playback::setDuration(const audio::msecs_t durationMsec)
 {
     UNUSED(durationMsec);
     NOT_IMPLEMENTED;
 }
 
-muse::async::Promise<bool> Audacity3Playback::setLoop(const audio::msecs_t fromMsec, const audio::msecs_t toMsec)
+muse::async::Promise<bool> Au3Playback::setLoop(const audio::msecs_t fromMsec, const audio::msecs_t toMsec)
 {
     UNUSED(fromMsec);
     UNUSED(toMsec);
@@ -257,32 +257,32 @@ muse::async::Promise<bool> Audacity3Playback::setLoop(const audio::msecs_t fromM
     });
 }
 
-void Audacity3Playback::resetLoop()
+void Au3Playback::resetLoop()
 {
 }
 
-muse::async::Channel<au::audio::msecs_t> Audacity3Playback::playbackPositionMsecs() const
+muse::async::Channel<au::audio::msecs_t> Au3Playback::playbackPositionMsecs() const
 {
     return m_playbackPositionMsecsChanged;
 }
 
-muse::async::Channel<au::audio::PlaybackStatus> Audacity3Playback::playbackStatusChanged() const
+muse::async::Channel<au::audio::PlaybackStatus> Au3Playback::playbackStatusChanged() const
 {
     return m_playbackStatusChanged;
 }
 
-IAudacity3AudioOutputPtr Audacity3Playback::audioOutput() const
+IAu3AudioOutputPtr Au3Playback::audioOutput() const
 {
     return m_audioOutputPtr;
 }
 
-AudacityProject& Audacity3Playback::projectRef() const
+AudacityProject& Au3Playback::projectRef() const
 {
     AudacityProject* project = reinterpret_cast<AudacityProject*>(globalContext()->currentProject()->au3ProjectPtr());
     return *project;
 }
 
-bool Audacity3Playback::canStopAudioStream() const
+bool Au3Playback::canStopAudioStream() const
 {
     auto gAudioIO = AudioIO::Get();
     AudacityProject& project = projectRef();
@@ -291,7 +291,7 @@ bool Audacity3Playback::canStopAudioStream() const
            || gAudioIO->GetOwningProject().get() == &project;
 }
 
-TransportSequences Audacity3Playback::makeTransportTracks(TrackList& trackList, bool selectedOnly, bool nonWaveToo)
+TransportSequences Au3Playback::makeTransportTracks(TrackList& trackList, bool selectedOnly, bool nonWaveToo)
 {
     TransportSequences result;
     {
diff --git a/au4/src/au3wrap/audacity3playback.h b/au4/src/au3wrap/internal/au3playback.h
similarity index 77%
rename from au4/src/au3wrap/audacity3playback.h
rename to au4/src/au3wrap/internal/au3playback.h
index 18d849849cef49914c0ef2ec12e2220444daa30c..8a9ca9a636b2fd4846ca3e4eb4843c873757fce9 100644
--- a/au4/src/au3wrap/audacity3playback.h
+++ b/au4/src/au3wrap/internal/au3playback.h
@@ -1,8 +1,8 @@
 /*
 * Audacity: A Digital Audio Editor
 */
-#ifndef AU_AU3WRAP_AUDACITY3PLAYBACK_H
-#define AU_AU3WRAP_AUDACITY3PLAYBACK_H
+#ifndef AU_AU3WRAP_AU3PLAYBACK_H
+#define AU_AU3WRAP_AU3PLAYBACK_H
 
 #include "async/asyncable.h"
 
@@ -10,15 +10,15 @@
 #include "actions/iactionsdispatcher.h"
 #include "context/iglobalcontext.h"
 
-#include "iaudacity3playback.h"
-#include "iaudacity3audiooutput.h"
+#include "iau3playback.h"
+#include "iau3audiooutput.h"
 
 class AudacityProject;
 class TrackList;
 struct TransportSequences;
 
 namespace au::au3 {
-class Audacity3Playback : public IAudacity3Playback, public muse::async::Asyncable
+class Au3Playback : public IAu3Playback, public muse::async::Asyncable
 {
     muse::Inject<au::context::IGlobalContext> globalContext;
 
@@ -38,7 +38,7 @@ public:
     muse::async::Channel<audio::msecs_t> playbackPositionMsecs() const override;
     muse::async::Channel<audio::PlaybackStatus> playbackStatusChanged() const override;
 
-    IAudacity3AudioOutputPtr audioOutput() const override;
+    IAu3AudioOutputPtr audioOutput() const override;
 
 private:
     AudacityProject& projectRef() const;
@@ -49,8 +49,8 @@ private:
     mutable muse::async::Channel<audio::msecs_t> m_playbackPositionMsecsChanged;
     mutable muse::async::Channel<audio::PlaybackStatus> m_playbackStatusChanged;
 
-    IAudacity3AudioOutputPtr m_audioOutputPtr;
+    IAu3AudioOutputPtr m_audioOutputPtr;
 };
 }
 
-#endif // AU_AU3WRAP_AUDACITY3PLAYBACK_H
+#endif // AU_AU3WRAP_AU3PLAYBACK_H
diff --git a/au4/src/playback/internal/playbackcontroller.h b/au4/src/playback/internal/playbackcontroller.h
index 740b5612c2e40e4a0b2b1e2e294ed39e07e615e9..03e08218202533bf083b75b89c64bfd46351c74c 100644
--- a/au4/src/playback/internal/playbackcontroller.h
+++ b/au4/src/playback/internal/playbackcontroller.h
@@ -11,7 +11,7 @@
 #include "context/iglobalcontext.h"
 #include "iinteractive.h"
 
-#include "au3wrap/iaudacity3playback.h"
+#include "au3wrap/iau3playback.h"
 
 #include "../iplaybackcontroller.h"
 
@@ -21,7 +21,7 @@ class PlaybackController : public IPlaybackController, public muse::actions::Act
     INJECT_STATIC(muse::actions::IActionsDispatcher, dispatcher)
     INJECT_STATIC(au::context::IGlobalContext, globalContext)
     INJECT_STATIC(muse::IInteractive, interactive)
-    INJECT_STATIC(au3::IAudacity3Playback, au3Playback)
+    INJECT_STATIC(au3::IAu3Playback, au3Playback)
 
 public:
     void init();
diff --git a/au4/src/playback/view/toolbars/playbacktoolbarlevelitem.h b/au4/src/playback/view/toolbars/playbacktoolbarlevelitem.h
index 8ee35fc1cba2103b5786698c400b3438b16d2c52..0e2fbd194617e9291f1dd0a7ec355cc017820308 100644
--- a/au4/src/playback/view/toolbars/playbacktoolbarlevelitem.h
+++ b/au4/src/playback/view/toolbars/playbacktoolbarlevelitem.h
@@ -7,7 +7,7 @@
 #include <QString>
 
 #include "modularity/ioc.h"
-#include "au3wrap/iaudacity3playback.h"
+#include "au3wrap/iau3playback.h"
 
 #include "playbacktoolbarabstractitem.h"
 
@@ -18,7 +18,7 @@ class PlaybackToolBarLevelItem : public PlaybackToolBarAbstractItem
 
     Q_PROPERTY(int level READ level WRITE setLevel NOTIFY levelChanged FINAL)
 
-    muse::Inject<au3::IAudacity3Playback> playback;
+    muse::Inject<au3::IAu3Playback> playback;
 
 public:
     explicit PlaybackToolBarLevelItem(const muse::ui::UiAction& action, const ItemType& type, QObject* parent = nullptr);
diff --git a/au4/src/processing/dom/processingproject.cpp b/au4/src/processing/dom/processingproject.cpp
index 5fb6220c01704fc408c88773aa508aa9e4e34aff..0ed866eda3033cdaefc5d1ee86518a5e98f3875f 100644
--- a/au4/src/processing/dom/processingproject.cpp
+++ b/au4/src/processing/dom/processingproject.cpp
@@ -1,6 +1,6 @@
 #include "processingproject.h"
 
-#include "au3wrap/audacity3project.h"
+#include "au3wrap/au3project.h"
 
 #include "log.h"
 
@@ -9,7 +9,7 @@ using namespace au::processing;
 
 ProcessingProject::ProcessingProject() {}
 
-void ProcessingProject::setAudacity3Project(std::shared_ptr<au::au3::Audacity3Project> au3)
+void ProcessingProject::setAudacity3Project(std::shared_ptr<au::au3::Au3Project> au3)
 {
     m_au3 = au3;
 }
diff --git a/au4/src/processing/dom/processingproject.h b/au4/src/processing/dom/processingproject.h
index aa3e97d409710fa1cd4ecf6de89af1313ef14920..cc959a42c709cb5f9f4f4d71fdfe7046f55eaf08 100644
--- a/au4/src/processing/dom/processingproject.h
+++ b/au4/src/processing/dom/processingproject.h
@@ -8,7 +8,7 @@
 #include "track.h"
 
 namespace au::au3 {
-class Audacity3Project;
+class Au3Project;
 }
 
 namespace au::processing {
@@ -18,8 +18,8 @@ class ProcessingProject
 public:
     ProcessingProject();
 
-    void setAudacity3Project(std::shared_ptr<au::au3::Audacity3Project> au3);
-    const std::shared_ptr<au::au3::Audacity3Project>& audacity3Project() const { return m_au3; }
+    void setAudacity3Project(std::shared_ptr<au::au3::Au3Project> au3);
+    const std::shared_ptr<au::au3::Au3Project>& audacity3Project() const { return m_au3; }
 
     muse::async::NotifyList<Track> trackList() const;
     muse::async::NotifyList<Clip> clipList(const TrackId& trackId) const;
@@ -31,7 +31,7 @@ public:
 
 private:
 
-    std::shared_ptr<au::au3::Audacity3Project> m_au3;
+    std::shared_ptr<au::au3::Au3Project> m_au3;
 
     mutable std::map<TrackId, muse::async::ChangedNotifier<Clip>> m_clipsChanged;
 };
diff --git a/au4/src/project/internal/audacityproject.cpp b/au4/src/project/internal/audacityproject.cpp
index 3e08239d8554113472a4983ab0f2e83c99d4f10f..d354698fae266af7cee2adf18dc83832ee0ee6a6 100644
--- a/au4/src/project/internal/audacityproject.cpp
+++ b/au4/src/project/internal/audacityproject.cpp
@@ -1,6 +1,6 @@
 #include "audacityproject.h"
 
-#include "au3wrap/audacity3project.h"
+#include "au3wrap/au3project.h"
 #include "iprojectautosaver.h"
 #include "projecterrors.h"
 #include "global/io/ioretcodes.h"
@@ -61,7 +61,7 @@ muse::Ret Audacity4Project::doLoad(const io::path_t& path, bool forceMode, const
     UNUSED(forceMode);
     UNUSED(format);
 
-    m_au3Project = au3::Audacity3Project::create();
+    m_au3Project = au3::Au3Project::create();
     bool isLoaded = m_au3Project->load(path);
     if (!isLoaded) {
         LOGE() << "Failed load:" << path;
diff --git a/au4/src/project/internal/audacityproject.h b/au4/src/project/internal/audacityproject.h
index 2c05517004aae166eb3058b714e9fbb6c66d61d8..aa7405182f693aa599168f98372f66677b89cbc3 100644
--- a/au4/src/project/internal/audacityproject.h
+++ b/au4/src/project/internal/audacityproject.h
@@ -2,12 +2,12 @@
 #define AU_PROJECT_AUDACITYPROJECT_H
 
 #include "../iaudacityproject.h"
-#include "au3wrap/audacity3project.h"
+#include "au3wrap/au3project.h"
 #include "modularity/ioc.h"
 #include "io/ifilesystem.h"
 
 namespace au::au3 {
-class Audacity3Project;
+class Au3Project;
 }
 
 namespace au::project {
@@ -27,7 +27,7 @@ namespace au::project {
 //!
 //! There is also a project from AU3 (::AudacityProject),
 //! through which we receive a lot of data using the AU3 implementation.
-//! And a wrapper in AU4 for this project (au::au3::Audacity3Project)
+//! And a wrapper in AU4 for this project (au::au3::Au3Project)
 //! A wrapper is needed for two reasons:
 //! * Technical - the AU3 code is strongly linked at the linking level,
 //! it cannot be used in parts, therefore, to avoid duplication of symbols,
@@ -85,7 +85,7 @@ private:
     bool m_isImported = false;
     bool m_needAutoSave = false;
 
-    std::shared_ptr<au::au3::Audacity3Project> m_au3Project;
+    std::shared_ptr<au::au3::Au3Project> m_au3Project;
 
     au::processing::ProcessingProjectPtr m_processingProject;
 };
diff --git a/au4/src/projectscene/projectscenemodule.h b/au4/src/projectscene/projectscenemodule.h
index 83e0dd750138b67c30d1dfaa5c6d25e5e4bf0b3f..51b9be9cb2c11889551c87bb0ed330fa23228979 100644
--- a/au4/src/projectscene/projectscenemodule.h
+++ b/au4/src/projectscene/projectscenemodule.h
@@ -20,7 +20,6 @@ public:
     void registerExports() override;
     void resolveImports() override;
     void registerUiTypes() override;
-    void registerResources() override;
     void onInit(const muse::IApplication::RunMode& mode) override;
 
 private: