pcm.dmix6 {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:0,0"
        rate 48000
        channels 6
        format "S32_LE"
        period_time 0
        period_size 1024
        buffer_time 0
        buffer_size 4096
   }
}
pcm.!default {
    type plug
    slave.pcm "ch51dup"
}

pcm.ch51dup {
        type route
        slave.pcm dmix6
        ttable.0.0 1
        ttable.1.1 1
        ttable.0.2 1
        ttable.1.3 1
        ttable.0.4 0.5
        ttable.1.4 0.5
        ttable.0.5 0.5
        ttable.1.5 0.5
   }