On Sun, 2015-01-04 at 20:54 +0100, Martin Klein wrote: > Hi, > > > I want to split the different outputs ports of my surround card to > different sinks. For this, I'm trying to use module-remap-sink with > the following lines in my /etc/pulse/default.pa: > > > load-module module-remap-sink sink_name=speakers remix=no > master=alsa_output.pci-0000_00_1b.0.analog-surround-51 channels=2 > master_channel_map=front-left,front-right > channel_map=front-left,front-right > load-module module-remap-sink sink_name=headphones remix=no > master=alsa_output.pci-0000_00_1b.0.analog-surround-51 channels=2 > master_channel_map=rear-left,rear-right > channel_map=front-left,front-right > > > After restarting my pulseaudio, two new sinks appear. However, those > two sinks won't produce any output on any of my audio ports. The old > default output sink of the soundcard still works, but outputs the same > stereo sound on all ports. > > > After fiddling around a few hours, I'm pretty sure that the underlying > problem is that my surround sound doesn't work at all with pulseaudio. > When I change my profile to Analog Surround 5.1 Output with > pavucontrol, 6 mixers appear on the Output Devices tab. However, of > those mixers, only the two front mixers will change the output volume > (for all outputs). Any of the other mixers won't change anything for > any of my output ports. When trying to play a film with 5.1 sound, all > my output ports produce the same sound. I've also tried the > default-sample-channels = 6 option mentioned in the documentation, to > no avail. As far as I understand, this option is now obsolete due to > the introduction of profiles (i.e. Analog Stereo Output, Analog > Surround 5.1 Output etc) anyway. > > > I'm pretty sure, that the problem lies within pulseaudio, as Alsa > seems to support 5.1 sound for my card: When I use alsamixer (by > selecting my soundcard with F6 instead of the pulse mixers), I can > change the volume of each of my output ports seperately. Additionally, > the Alsa test utility speaker-test -c 6 -t w reports the correct (and > different) sound output for each of my output ports. I believe that > somehow pulseaudio doesn't correctly map to Alsa's mixer channels. > I've spend the last day reading pulseaudio documentation and tried > different changes to my profiles in /usr/share/pulseaudio/alsa-mixer, > but nothing seems to work. My surround mixers keep broken and I don't > get any clear error message from pulseaudio. It sounds like the surround51 alsa device isn't working as it should. What if you try "speaker-test -D surround51:0 -c 6 -t wav"? Does it work as expected? -- Tanu
