pcm.!default {
  @args [ NAME ]
  @args.NAME {
    type string
    default "alsa-jack"
  }
  type plug
  slave { 
    pcm {
      type jack
      client_name $NAME 
      playback_ports {
          0 system:playback_1
          1 system:playback_2
      }
      capture_ports {
          0 system:capture_1
          1 system:capture_2
      }
    }
  }
}