MIXER_DEVICE
vdevgone(maj, mn|MIXER_DEVICE, mn|MIXER_DEVICE, VCHR);
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
case MIXER_DEVICE:
#define ISDEVMIXER(x) (AUDIODEV((x)) == MIXER_DEVICE)
audio_cmajor, MIXER_DEVICE, 4)) !=0)