Hello,
I’m facing a persistent audio crash in UE 5.8.3 when using Play in Editor. Interestingly, this only happens in my project, default templates work fine. The broken project has default audio settings, but it features a performance-heavy PCG Graph.
Audio is working correctly in Editor but glitches and completely dies when I start Play in Editor (Standalone not working either).
What I have already tried (none of this helped):
- Completely removed the heavy PCG graph from the project
- Cleaned Intermediate and Saved folders
- Verified that Windows audio output is strictly set to 24-bit, 48000 Hz
- Experimented with various values in AudioMaxChannels and AudioNumBuffersToEnqueue
- Tried different audio drivers/outputs (completely uninstalled Realtek to use generic Windows drivers, tested front-panel headphone jack vs. rear direct output)
- Updated motherboard BIOS
- Tried forcing XAudio2 (resulted in an immediate initialization failure)
I have hypothesis that it might be caused by bUseRenderScheduler, which crashes the audio due to desynchronization during level loading on startup (the default template is not as heavy, so it might not happen there). However, I haven’t managed to disable RenderScheduler in any way to test it, and besides, literally everyone would be running into this..
LogAudio:
LogAudio: Display: Pre-Initializing Audio Device Manager…
LogAudio: Display: AudioInfo: ‘OPUS’ Registered
LogAudioDebug: Display: Lib vorbis DLL was dynamically loaded.
LogAudio: Display: AudioInfo: ‘OGG’ Registered
LogAudio: Display: AudioInfo: ‘ADPCM’ Registered
LogAudio: Display: AudioInfo: ‘PCM’ Registered
LogAudio: Display: AudioInfo: ‘BINKA’ Registered
LogAudio: Display: AudioInfo: ‘RADA’ Registered
LogAudio: Display: Audio Device Manager Pre-Initialized
LogAudio: Display: Registering Engine Module Parameter Interfaces…
LogAudioCaptureCore: Display: No Audio Capture implementations found. Audio input will be silent.
LogAudioCaptureCore: Display: No Audio Capture implementations found. Audio input will be silent.
LogAudio: Display: Initializing Audio Device Manager…
LogAudio: Display: Loading Default Audio Settings Objects…
LogAudio: Display: No default SoundConcurrencyObject specified (or failed to load).
LogAudio: Display: Audio Device Manager Initialized
LogAudio: Display: Creating Audio Device: Id: 1, Scope: Shared, Realtime: True
LogAudioMixer: Display: bUseRenderScheduler set to true.
LogAudioMixer: Display: Audio Mixer Platform Settings:
LogAudioMixer: Display: Sample Rate: 48000
LogAudioMixer: Display: Callback Buffer Frame Size Requested: 1024
LogAudioMixer: Display: Callback Buffer Frame Size To Use: 1024
LogAudioMixer: Display: Number of buffers to queue: 1
LogAudioMixer: Display: Max Channels (voices): 32
LogAudioMixer: Display: Number of Async Source Workers: 4
LogAudio: Display: AudioDevice MaxSources: 32
LogAudio: Display: Audio Spatialization Plugin: None (built-in).
LogAudio: Display: Audio Reverb Plugin: None (built-in).
LogAudio: Display: Audio Occlusion Plugin: None (built-in).
LogAudioEnumeration: Display: Refreshing FWindowsMMDeviceCache
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Console’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Console’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Multimedia’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Multimedia’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Communications’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Communications’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioMixerWasapi: Display: FWasapiServiceWatcher started.
LogAudioMixer: Display: Initializing audio mixer using platform API: ‘WASAPIMixer’
LogAudioMixerWasapi: Display: FWasapiServiceWatcher initial state: Audiosrv=RUNNING, AudioEndpointBuilder=RUNNING
LogAudioMixerWasapi: FAudioMixerWasapiRenderStream::InitializeHardware DefaultDevicePeriod: 480 requesting buffer size: 1920
LogAudioMixerWasapi: Display: FAudioMixerWasapiRenderStream::InitializeHardware audio mixer requested num channels: 2, Wasapi render stream hardware supports num channels: 2
LogAudioMixerWasapi: Display: FAudioMixerWasapiRenderStream::InitializeHardware succeeded with sample rate: 48000, buffer period: 1024
LogAudioMixer: Display: FAudioMixerWasapi initialized: SampleRate=48000 NumChannels=2 NumDirectOutChannels=0 bIsAggregateDevice=0 StreamParams.Num()=1
LogAudioMixer: Display: Using Audio Hardware Device Realtek HD Audio 2nd output (Realtek(R) Audio)
LogAudioMixer: Display: Initializing Sound Submixes…
LogAudioMixer: Display: Creating Master Submix ‘MasterSubmixDefault’
LogAudioMixer: Display: Creating Master Submix ‘MasterReverbSubmixDefault’
LogAudioMixer: Display: Output buffers initialized: Frames=1024, Channels=2, Samples=2048, InstanceID=1
LogAudioMixer: Display: Starting AudioMixerPlatformInterface::RunInternal(), InstanceID=1
LogAudio: Display: Audio Device (ID: 1) registered with world ‘Untitled’.
LogAudioMixer: Initializing Audio Bus Subsystem for audio device with ID 1
LogAudio: Display: Audio Device unregistered from world ‘Untitled’.
LogAudio: Display: Audio Device (ID: 1) registered with world ‘Lvl_VehicleBasic’.
LogAudio: Display: Creating Audio Device: Id: 2, Scope: Unique, Realtime: True
LogAudioMixer: Display: bUseRenderScheduler set to true.
LogAudioMixer: Display: Audio Mixer Platform Settings:
LogAudioMixer: Display: Sample Rate: 48000
LogAudioMixer: Display: Callback Buffer Frame Size Requested: 1024
LogAudioMixer: Display: Callback Buffer Frame Size To Use: 1024
LogAudioMixer: Display: Number of buffers to queue: 1
LogAudioMixer: Display: Max Channels (voices): 32
LogAudioMixer: Display: Number of Async Source Workers: 4
LogAudio: Display: AudioDevice MaxSources: 32
LogAudio: Display: Audio Spatialization Plugin: None (built-in).
LogAudio: Display: Audio Reverb Plugin: None (built-in).
LogAudio: Display: Audio Occlusion Plugin: None (built-in).
LogAudioEnumeration: Display: Refreshing FWindowsMMDeviceCache
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Console’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Console’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Multimedia’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Multimedia’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Render Role=‘Communications’, Device=‘Realtek HD Audio 2nd output (Realtek(R) Audio)’
LogAudioEnumeration: Display: FWindowsMMDeviceCache: Default Capture Role=‘Communications’, Device=‘Microphone (3- USB Camera-B4.09.24.1)’
LogAudioMixerWasapi: Display: FWasapiServiceWatcher started.
LogAudioMixer: Display: Initializing audio mixer using platform API: ‘WASAPIMixer’
LogAudioMixerWasapi: Display: FWasapiServiceWatcher initial state: Audiosrv=RUNNING, AudioEndpointBuilder=RUNNING
LogAudioMixerWasapi: FAudioMixerWasapiRenderStream::InitializeHardware DefaultDevicePeriod: 480 requesting buffer size: 1920
LogAudioMixerWasapi: Display: FAudioMixerWasapiRenderStream::InitializeHardware audio mixer requested num channels: 2, Wasapi render stream hardware supports num channels: 2
LogAudioMixerWasapi: Display: FAudioMixerWasapiRenderStream::InitializeHardware succeeded with sample rate: 48000, buffer period: 1024
LogAudioMixer: Display: FAudioMixerWasapi initialized: SampleRate=48000 NumChannels=2 NumDirectOutChannels=0 bIsAggregateDevice=0 StreamParams.Num()=1
LogAudioMixer: Display: Using Audio Hardware Device Realtek HD Audio 2nd output (Realtek(R) Audio)
LogAudioMixer: Display: Initializing Sound Submixes…
LogAudioMixer: Display: Creating Master Submix ‘MasterSubmixDefault’
LogAudioMixer: Display: Creating Master Submix ‘MasterReverbSubmixDefault’
LogAudioMixer: Display: Output buffers initialized: Frames=1024, Channels=2, Samples=2048, InstanceID=2
LogAudioMixer: Display: Starting AudioMixerPlatformInterface::RunInternal(), InstanceID=2
LogAudio: Display: Audio Device (ID: 2) registered with world 'Lvl_VehicleBasic