_CHN_VOICE       1141 include/uapi/linux/soundcard.h 		_CHN_VOICE(dev, MIDI_NOTEON, chn, note, vol)
_CHN_VOICE       1144 include/uapi/linux/soundcard.h 		_CHN_VOICE(dev, MIDI_NOTEOFF, chn, note, vol)
_CHN_VOICE       1147 include/uapi/linux/soundcard.h 		_CHN_VOICE(dev, MIDI_KEY_PRESSURE, chn, note, pressure)