weird audio noise when starting playback in blender #87584

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opened 2021-04-17 15:33:58 +02:00 by Florian Meyer · 10 comments
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System Information
Operating system: Linux-5.10.26-1-MANJARO-x86_64-with-glibc2.33 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.67

Blender Version
Broken: version: 3.0.0 Alpha, branch: master (modified), commit date: 2021-04-16 17:44, hash: e524a6ecf7
Worked: (newest version of Blender that worked as expected)

Short description of error
I really do not know if this is reproducible somewhere else or not. Could be my os-audio setup.

In the recording i have placed my microphone in front of my desktop speakers. Audio is fine in the beginning. However once i start animation playback (in new empty file) in blender the audio begins to crackle. The crackling persists even when playback stops. However when closing blender the crackling stops.

2021-04-17 15-21-49.mkv

**System Information** Operating system: Linux-5.10.26-1-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.67 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master (modified), commit date: 2021-04-16 17:44, hash: `e524a6ecf7` Worked: (newest version of Blender that worked as expected) **Short description of error** I really do not know if this is reproducible somewhere else or not. Could be my os-audio setup. In the recording i have placed my microphone in front of my desktop speakers. Audio is fine in the beginning. However once i start animation playback (in new empty file) in blender the audio begins to crackle. The crackling persists even when playback stops. However when closing blender the crackling stops. [2021-04-17 15-21-49.mkv](https://archive.blender.org/developer/F9937394/2021-04-17_15-21-49.mkv)
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Added subscriber: @florianfelix

Added subscriber: @florianfelix
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Added subscriber: @ankitm

Added subscriber: @ankitm
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Changed status from 'Needs Triage' to: 'Needs User Info'

Changed status from 'Needs Triage' to: 'Needs User Info'
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Which audio device is being used ? Try changing it to OpenAL or SDL.
Related #86923

Which audio device is being used ? Try changing it to OpenAL or SDL. Related #86923
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There is no audio file (and no blender file, happens in a new unsaved blender instance). Audio is playing in youtube/chromium.

PulseAudio -> Yes to Crackling
OpenAL -> No Crackling
OpenAL - OpenAL Soft -> No Crackling
SDL -> No Crackling
None -> No Crackling
JACK -> No Crackling

Edit:
The crackling also does not appear when i set the mixing buffer to 4096 Samples or above (With PulseAudio). Everything below crackles.
However the crackling still persists even if playback is stoppped. But stops when changing the mixing Buffer rate.
The crackling also appears when audio is played from other sources (like Rhytmbox)

There is no audio file (and no blender file, happens in a new unsaved blender instance). Audio is playing in youtube/chromium. PulseAudio -> Yes to Crackling OpenAL -> No Crackling OpenAL - OpenAL Soft -> No Crackling SDL -> No Crackling None -> No Crackling JACK -> No Crackling Edit: The crackling also does not appear when i set the mixing buffer to 4096 Samples or above (With PulseAudio). Everything below crackles. However the crackling still persists even if playback is stoppped. But stops when changing the mixing Buffer rate. The crackling also appears when audio is played from other sources (like Rhytmbox)
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Added subscriber: @neXyon

Added subscriber: @neXyon
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CC @neXyon

CC @neXyon
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Ok another update.
I rebuild Blender just now and also had an OS update.
The problem seems to have gone away.
Sorry for the noise.

Ok another update. I rebuild Blender just now and also had an OS update. The problem seems to have gone away. Sorry for the noise.
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Changed status from 'Needs User Info' to: 'Archived'

Changed status from 'Needs User Info' to: 'Archived'
Member

okay, thanks!

okay, thanks!
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Reference: blender/blender#87584
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