linuxaudio.org

>
> #!/bin/bash
>
> AMIXER="amixer -q"
> CARD="-c 1"
>
> if [ x = xon ] ; then
> gain=32768
> verb="route"
> else
> gain=0
> verb="mute"
> fi
>
> shift;
>
> #input_source : 0-25 (physical channels),
> # 26-51 (software playback)
> #output_source : 0-25 (physical channels),
> # 26-27 (line out)
>
> case in
> play)
> for chn in $(seq 26 51);do
> $AMIXER $CARD cset numid=5 $chn,$(($chn-26)),$gain
> done
> ;;
>
> thru)
> for input in $(seq 0 25);do
> for output in $(seq 0 25); do
> if [ $input != $output ]; then
> $AMIXER $CARD cset numid=5 $input,$output,$gain
> fi
> done
> done
> ;;
>
> thru12)
> $AMIXER $CARD cset numid=5 0,0,$gain
> $AMIXER $CARD cset numid=5 1,1,$gain
> ;;
>
> mon)
> for chn in $(seq 26 51);do
> if [ $(($chn % 2)) -eq 0 ] ; then
> $AMIXER $CARD cset numid=5 $chn,,$gain
> else
> $AMIXER $CARD cset numid=5 $chn,,$gain
> fi
> done
> ;;
>
> all)
> for input in $(seq 0 51); do
> for output in $(seq 0 27); do
> echo -n "."
> if [ $gain = 0 -o $input != $output ]; then
> $AMIXER $CARD cset numid=5 $input,$output,$gain
> fi
> done
> echo
> done
> ;;
> esac