A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2321> ====================================================================== Reported By: doobedoobedo Assigned To: Clemens Ladisch ====================================================================== Project: ALSA - driver Issue ID: 2321 Category: USB - usb-audio Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: Gentoo Kernel Version: 2.6.14/5 ====================================================================== Date Submitted: 08-01-2006 16:43 CEST Last Modified: 08-03-2006 17:34 CEST ====================================================================== Summary: no audio and very few mixer options with C-Media 106 based USB sound card Description: no audio output with the snd-usb-audio module amixer output: Simple mixer control 'PCM',0 Capabilities: cvolume cswitch cswitch-joined Capture channels: Front Left - Front Right Limits: Capture 0 - 4095 Front Left: Capture 2048 [50%] [on] Front Right: Capture 2048 [50%] [on] Simple mixer control 'PCM Capture Source',0 Capabilities: enum Items: 'Mic' 'Input 1' 'Input 2' 'Mixer' Item0: 'Mic' Simple mixer control 'PCM',1 Capabilities: cvolume Capture channels: Front Left - Front Right Limits: Capture 0 - 4095 Front Left: Capture 2048 [50%] Front Right: Capture 2048 [50%] Simple mixer control 'Mic',0 Capabilities: pvolume cvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 8191 Capture 0 - 4095 Front Left: Playback 2048 [25%] [off] Capture 2048 [50%] Front Right: Playback 2048 [25%] [off] Capture 2048 [50%] Simple mixer control 'Auto Gain Control',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 8191 Mono: Front Left: Playback 2048 [25%] [on] Front Right: Playback 2048 [25%] [on] Simple mixer control 'Speaker',1 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 37 Mono: Playback 15 [41%] [on] speaker 0 and mic will only decrease in volume in alsamixer, although no sound is played trough the speakers at all. ====================================================================== ---------------------------------------------------------------------- doobedoobedo - 08-03-06 03:40 ---------------------------------------------------------------------- I now have it producing 6 channel sound :). It worked on another machine (also Gentoo), so I changed some kernel configs and I have it working with the exception of some of the channels being swapped. I'll update tomorrow as to which. I can't move them using .asoundrc as it complains: aplay -D swapchannels Surround-SDL-testfiles/chan-id.wav -c6 Playing WAVE 'Surround-SDL-testfiles/chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 6 aplay: set_params:879: Broken configuration for this PCM: no configurations available ---------------------------------------------------------------------- doobedoobedo - 08-03-06 17:34 ---------------------------------------------------------------------- swapcahannels was defined as: pcm.swapchannels { type route slave.pcm "snd-usb-audio" slave.channels 6 ttable.0.0 1 ttable.1.1 1 ttable.2.2 1 ttable.3.3 1 ttable.4.4 1 ttable.5.5 1 } The only control in alsamixer which is adjustable both up and down is 'Speaker 1' it controls the volume on all channels. aplay -D plughw:1,0 Surround-SDL-testfiles/chan-id.wav -c6 produces sound from all specified channels however the channels are swapped as below: channel --> speaker FL --> FR FR --> FL Centre --> RL LFE --> RR RL --> Centre RR --> LFE I've found the manufacturers page for the product http://www.asound.com/Productdetails.asp?ProductClass=32&ID=159 Please say if there is any other useful information I can give which will allow me to get the outputs to the correct speakers. I've tried swapping the cables around but then I have RL/RR swapped and centre/LFE swapped. I could get around it by making some custom cables which swap the outputs, but it would be better to have the driver either swap them internally or allow the swapping using asoundrc. Also lack of a functioning PCM and no Master controls is causing problems with volume control in mythtv and xine. Issue History Date Modified Username Field Change ====================================================================== 08-01-06 16:43 doobedoobedo New Issue 08-01-06 16:43 doobedoobedo Distribution => Gentoo 08-01-06 16:43 doobedoobedo Kernel Version => 2.6.14/5 08-01-06 16:51 doobedoobedo Issue Monitored: doobedoobedo 08-01-06 16:54 doobedoobedo Note Added: 0011376 08-03-06 03:40 doobedoobedo Note Added: 0011393 08-03-06 17:34 doobedoobedo Note Added: 0011404 ====================================================================== ------------------------------------------------------------------------- Take Surveys. Earn Cash. 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