Symbol: USB_AUDIO_MUTE_CONTROL
usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c
3399
(USB_AUDIO_MUTE_CONTROL << 8) | channel, /* wValue */
usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c
5018
USB_AUDIO_MUTE_CONTROL,