2015-01-21 12:10 GMT+01:00 Tanu Kaskinen <tanu.kaskinen at linux.intel.com>: > On Sun, 2015-01-18 at 13:54 +0100, Martin Klein wrote: >> Okay, this works as expected, i.e. I hear the noise on the intended >> speaker. Thank you for suggesting this test. Now to summarize: In >> principle surround seems to work with both Alsa and Pulse (i.e. I can >> output sound on only the intended speaker). However, both volume >> controls and module-remap-sink does not work for the surround channels >> with pulseaudio. Any ideas on how to debug this further? > > If we still ignore the volume control problem, the next step is to > investigate what goes wrong with module-remap-sink. You said it doesn't > give any output. Check the volume and mute state of the remap sink and > the sink input between the remap sink and the master sink. If those are > ok, check that the mixing matrix looks ok (the matrix is shown in the > debug log of the server when you load module-remap-sink). > Checking the volume and mute state of the remap sink was the first thing I checked. The channel is unmuted, I toggled the mute state and increased the volume to the max. All to no avail. Thank you for your suggestion regarding the channel matrix. Unfortunately I couldn't find any documentation on how to interpret the channel matrix. I think I found the two matrices corresponding to my to remap sinks: http://pastebin.com/CuDjDaM4 I have no idea on how to interpret this. I'm a little bit confused by the separator line for in the first matrix. Also, the asymmetry of the second matrix looks weird to me (there is an empty row between the 1 of the second columns. Thank you for your help! Martin
