On Sun, 14 Mar 2004, Andreas Bulling wrote:
> -----
> [EMAIL PROTECTED] andreas $ aplay -Dsurround51 /usr/kde/3.2/share/sounds/pop.wav
> Playing WAVE '/usr/kde/3.2/share/sounds/pop.wav' : Signed 16 bit Little Endian, Rate
> 44100 Hz, Mono
> aplay: set_params:827: Sample format non available
> -----
>
> The common format problem, but why hasn't it already been fixed in
> /usr/share/alsa/cards/ICE1724.conf? I looked into the file, changed a little
Because it's perfectly ok. The applications should use 'plug:surround51'
device if they want to enable automatic conversions. So, report this bug
to xine developers.
> bit but had no success.
> Using -Dplug:surround51 instead works, but still without sound out of the
> rear speakers...
Are you sure that xine sends six channels to device? It looks like that
only two channels are processed and in this case alsa-lib default
configuration copies only two channels to output.
If you refer to 'aplay -Dplug:surround51' then it won't work, too. Same
problem - you need to override the default policy for the plug plugin:
route_policy STR # route policy for automatic ttable generation
# STR can be 'default', 'average', 'copy', 'duplicate'
# average: result is average of input channels
# copy: only first channels are copied to destination
# duplicate: duplicate first set of channels
# default: copy policy, except for mono capture - sum
So, you need something like:
pcm.duplicate {
type plug
slave.pcm "surround51"
route_policy duplicate
}
And now, 'aplay -Dduplicate' will duplicate stream to all six channels.
It is also possible that you can do duplication at hardware level, but
I don't remember the ICE1724 datasheet....
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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