arif setiawan wrote:
> We have a beagleboard with one audio line-in and one audio line-out. From
> the documentation both are stereo line. Now we want to use four mono audio
> line for our system. two input from radio and microphone, two output to
> radio and speaker. We use ALSA and we would like to know how we can achieve
> this either by plugin or programming alsa.
Try something like this:
pcm_slave.stereo {
pcm "hw:0,0" # or whatever your device is
channels 2
}
pcm.left {
type asym
playback.pcm {
type plug
slave.pcm {
type dshare
slave stereo
ipc_key 200907241
bindings [ 0 ]
}
}
capture.pcm {
type plug
slave.pcm {
type dsnoop
slave stereo
ipc_key 200907242
bindings [ 0 ]
}
}
}
pcm.right {
type asym
playback.pcm {
type plug
slave.pcm {
type dshare
slave stereo
ipc_key 20090724
bindings [ 1 ]
}
}
capture.pcm {
type plug
slave.pcm {
type dsnoop
slave stereo
ipc_key 200907242
bindings [ 1 ]
}
}
}
HTH
Clemens
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