YM_MONITOR_MUTE   231 dev/isa/ym.c   	{ YM_MONITOR_MUTE, AD1848_KIND_MUTE, AD1848_MONITOR_CHANNEL },
YM_MONITOR_MUTE   497 dev/isa/ym.c   	case YM_MONITOR_MUTE:
YM_MONITOR_MUTE   498 dev/isa/ym.c   		if (dip->index == YM_MONITOR_MUTE)