Symbol: USB_AUDIO_MUTE
usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c
814
case USB_AUDIO_MUTE:
usr/src/uts/common/io/usb/clients/audio/usb_ah/usb_ah.c
804
mctlmsg.ioc_cmd = USB_AUDIO_MUTE;