I just assembled a partial arduinoboy lacking MIDI IN ports. I seem to almost have gotten the MIDIOUT mode working but the AB's MIDI OUT port seems to be spitting out garbage. For example I will play a pattern on LSDJ with a just note in the first step with the effect N04 and what I see in my MIDI monitor is a bunch of weird commands.
the AB seems to be sending a lot of different data but I can't seem to get it to produce a simple Note On, or any coherent output.