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.duplicate {
    type plug
    slave.pcm "dmix6"
    slave.channels 6
    slave.format "S32_LE"
    route_policy duplicate
}