Hi,
here is a copy of my ".asoundrc":
pcm.!default {
type plug
# slave { pcm "hw:Digi968,0" }
slave { pcm "hw:DSP" }
# route_policy duplicate
route_policy copy
}
Switching 'route_policy' from 'duplicate' to 'copy' keeps only a single
output (channel 1) for a single channel aplay input file. Now you can
use the hdspmixer (or amixer in scripts) to route the first output to
any channel. Here is a sniplet from my /etc/rc.local:
/usr/bin/amixer -q -D hw:DSP cset numid=5 26,24,32768
/usr/bin/amixer -q -D hw:DSP cset numid=5 27,25,32768
/usr/bin/amixer -q -D hw:DSP cset numid=5 26,0,32768
/usr/bin/amixer -q -D hw:DSP cset numid=5 27,1,32768
This routes the first two software output channels to ADAT1 out1+2 and
SPDIF on my HDSP9652.
I hope this helps.
Giso
Paul Davis wrote:
> On Sun, Aug 9, 2009 at 12:52 PM, Peter Plessas<plessas@xxxxxx> wrote:
>> Hi List,
>>
>> how can i tell aplay to use just single channel(s) of my HDSP card?
>> When doing:
>> aplay -D default:Card=DSP file.wav
>> i get playback on all 18 channels.
>>
>> any help is appreciated!
>
> you would need an ~/.asoundrc file that defines a "route" "plugin
> device" that explicitly has only 1 (or 2) channels that are mapped to
> the relevant channels of the real card. i'm afraid i don't have the
> time or memory to provide an example - google will help, for sure..
> then tell aplay to use that device instead of "default:Card=DSP"
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