[alsa-devel] Adjust volume may cause audio playback corruption
fykcee1 at gmail.com
Thu May 17 23:34:20 CEST 2012
在 2012年5月18日星期五，Clemens Ladisch 写道：
> cee1 wrote:
> > We've found a way the can reproduce the problem more quickly on our
> > 1. do audio playback
> > 2. alsamixer, select 'Master', press 'm' and hold for a while.
> > Then release 'm', playback corrupts(sounds similar to
> > http://dev.lemote.com/files/upload/software/PA-apc/corrupted_sound.ogg).
> Is the output supposed to be playing or muted at this time?
> This appears to be a problem with PA's volume handling.
> It might be caused by incorrect dB volume information of the HDA codec,
> or by a bug in PA.
> > What does rewind do? Why we need rewind here?
> It allows to rewrite already written parts of the audio buffer; it's used
> to apply the new volume to samples that have not yet been actually played.
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