[pulseaudio-discuss] [PATCH 1/2] alsa-mixer: Fix reference to too high channel numbers

Tanu Kaskinen tanuk at iki.fi
Tue Mar 8 20:52:57 UTC 2016

On Wed, 2016-03-09 at 00:28 +0800, Raymond Yau wrote:
> > > Alsa mixer api just combine volume control and mute switch with same name
> > > to an element,
> > > 
> > > Is it possible that  these two control have different number of channels
> > > for some sound card ?
> > I don't know if it's possible, but the PulseAudio code works in any
> > case, because the switch handling code doesn't depend on how many
> > channels the corresponding volume element has.
> > 
> Do you mean that side speakers still have sound when selecting 5.1 profile
> when user have 7.1 speakers since alsa snd hda intel driver use copy front?

I don't know what "copy front" means. I sure hope that it doesn't mean
that the driver copies audio from the front speakers to the side
speakers when pulseaudio uses the "surround51" device.


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