Sorry to necrobump this thread, but if anyone is wondering (like I was a month ago) how to do this without using the TeensyBoy sketch I can help. You have to use the ps2dev Arduino library.
2 May 2, 2016 3:39 pm
Re: LSDJ with MIDI Keyboard and Arduinoboy (9 replies, posted in Nintendo Handhelds)
I am having the same issue as lambdata. I have LSDJ in keyboard mode, Arduinoboy is set to keyboard mode, M-U-T-E functions are working but the Gameboy only plays F#6 no matter what note I send. Help??