now midi in, out (merges message from midi in with messages made by arduino...)
all midi messages are transmitted except sysex and note aftertouch; that should be enough for most live performance with midi.
the goal of this is to be able to plug a midi keyboard into the arduino then to a expander (or computer). then it is easy to add controlers (nunchuck, pot, rotary encoder...).
enjoy !
see olivar-premier.org and go to Arduino !