Small MIDI decoder on the Arduino UNO for Hauptwerk
I built a small midi decoder based on Arduino UNO, to signal when the stops was turned on and off in the GrandOrgue (or Hauptwerk) software. Arduino reacts to incoming messages from MidiON and MidiOFF on any channel, lighting or extinguishing LED connected to pins 2 to 13 and A0 to A5. To simplify…