pcm.!default {
  type plug
  slave.pcm "dmixer"
}
pcm.dsp0 {
    type plug
    slave.pcm "dmixer"
}

pcm.dmixer {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:0,4"
	 period_time 0
         period_size 1024 # must be power of 2
         buffer_size 8192  # dito. It
     }
     bindings {
        0 0
        1 1
     }
}