Edit File: rear.conf
# # Hardware output from rear speakers # pcm.!rear { @args [ CARD DEV ] @args.CARD { type string default { @func getenv vars [ ALSA_REAR_CARD ALSA_PCM_CARD ALSA_CARD ] default { @func refer name defaults.pcm.rear.card } } } @args.DEV { type integer default { @func igetenv vars [ ALSA_REAR_DEVICE ] default { @func refer name defaults.pcm.rear.device } } } type empty slave.pcm { @func refer name { @func concat strings [ "cards." { @func card_driver card $CARD } ".pcm.rear." $DEV ":CARD=" $CARD ] } } hint { show { @func refer name defaults.namehint.basic } description "Rear speakers" device $DEV } }