pcm.usbstream { @args [ CARD RATE PERIOD_SIZE ] @args.CARD { type string default { func refer name defaults.pcm.card } } @args.RATE { type integer } @args.PERIOD_SIZE { type integer } type usb_stream card $CARD rate $RATE period_size $PERIOD_SIZE hint { show { @func refer name defaults.namehint.basic } description "USB Stream Output" } }