int32.positive note
int32.positive velo
None
combo device
spinner channel
uint8_t pren;
uint8_t prev;
if ((inlet_note != pren) || (inlet_velo != prev)) {
MidiSend3((midi_device_t)attr_device, MIDI_NOTE_ON + (attr_channel - 1),
inlet_note, inlet_velo);
pren = inlet_note;
prev = inlet_velo;
}