pcm.!default {
    type asym
    playback.pcm "plug:dmix"
    capture.pcm {
        type route
        slave.pcm "plug:dsnoop"
        ttable.0.0 2.0
        ttable.0.1 0.0
        ttable.1.0 0.0
        ttable.1.1 2.0
    }
}