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Until last world update I was happily using the following .asoundrc [1] |
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to duplicate stereo sound from front to rear channels (the former is |
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connected to a 2.1 system, the latter to a hi-fi equipment): |
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|
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pcm.ch40dup { |
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type route |
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slave.pcm surround40 |
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slave.channels 4 |
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ttable.0.0 1 |
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ttable.1.1 1 |
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ttable.0.2 1 |
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ttable.1.3 1 |
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} |
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|
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and then "mplayer -channels 4 -ao alsa:device=ch40dup" gave me the |
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duplicated stereo sound on 4 channels. |
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|
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After last update alsa-lib went from 1.0.19 to 1.0.20 and kernel 2.6.29 |
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to 2.6.30 and mplayer sound stopped working from any channel with the |
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following error: |
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|
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Trying preferred audio driver 'alsa', options 'device=ch40dup' |
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alsa-init: requested format: 48000 Hz, 2 channels, 9 |
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alsa-init: using ALSA 1.0.20 |
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alsa-init: setup for 1/2 channel(s) |
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alsa-init: using device ch40dup |
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alsa-init: pcm opened in blocking mode |
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[AO_ALSA] Unable to get initial parameters: Invalid argument |
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Failed to initialize audio driver 'alsa:device=ch40dup' |
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Could not open/initialize audio device -> no sound. |
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|
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If I remove the "-ao alsa:device..." bit from the mplayer command line I |
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get stereo sound from the front speakers only. |
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|
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This is with HDA-intel driver on Nvidia nForce430/AD1986 chipset, icewm |
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desktop. I just read from the kernel doc [2] that there is a "model |
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name" parameter that defaults to '6stack' while my model is '3stack' so |
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tonight I will try that. |
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|
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Any other hints before I try upstream? |
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|
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thanks, |
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|
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raf |
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|
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[1] |
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http://alsa.opensrc.org/index.php/Playing_stereo_on_surround_sound_setup_%28Howto%29 |
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|
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[2] /usr/src/linux/Documentation/sound/alsa/HD-Audio-Models.txt |
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