2016-03-09 4:52 GMT+08:00 Tanu Kaskinen <tanuk at iki.fi>: > 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. > https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/hda_codec.c?id=4b3acaf5b56f53ef259a6ddf8e17dcb529631d9b hda-codec - Feed front signals to all surrounds > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20160309/5a726c9a/attachment.html>
