[vlc-devel] Audio problem: latest git always tries S/PDIF?

Rémi Denis-Courmont remi at remlab.net
Thu Apr 21 17:19:47 CEST 2011


On Wednesday 20 April 2011, Juha Jeronen wrote:
> >> If the ALSA device in the ALSA output module section of VLC preferences
> >> is forced to the onboard sound chip explicitly, no error is generated,
> >> but the sound becomes extremely loud and distorted. It sounds like
> >> digital clipping - as if it's not limiting the volume to 100%. I have
> >> set volume as 256 (out of 1024) in the VLC audio preferences, so it
> >> should do the limiting. This may have something to do with the
> >> audio-related commit Rémi mentioned the other day...
> > 
> > Is it any better if you remove the SOFTVOL flag from the ALSA plugin?
> Tested now. No effect, the behaviour is the same either way.
> Also, noticed now that when the device is forced, the VLC volume slider
> seems to have no effect on the audio output level. SOFTVOL doesn't
> affect this either way.
> Is there anything I could do to help trace this?

I have no idea. If the volume is not working, then the bug is likely in the 
VLC core (the audio core is full of bugs, the code is hard to grasp and almost 
any attempt to fix something breaks something else).

Rémi Denis-Courmont

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