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No sound output with userland driver, multiple output device and audio units.
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No sound output with userland driver, multiple output device and audio units.


  • Subject: No sound output with userland driver, multiple output device and audio units.
  • From: Ploytec <email@hidden>
  • Date: Tue, 29 Apr 2014 13:12:10 +0200

Hi there

When I include my userland driver in a multiple output device and use it as master device, there is no audio output nor progress  in audio unit based softwares (iTunes, Audacity...) and I get this kind of error:
> 29/04/2014 12:54:30,004 iTunes[221]: kAudioUnitErr_TooManyFramesToProcess : inFramesToProcess=1024, mMaxFramesPerSlice=512

It the built in input, for example, is the master device, everything works as expected.
What can cause this? What can I do to fix it?

Thanks in advance
Eric Gorouben
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    • Re: No sound output with userland driver, multiple output device and audio units. Probably a bug in core audio.
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      • From: Ed Wynne <email@hidden>
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