Quite recently I had a shift in thought over how the Arduino was going to communicate with the Pi. At first I was going to use a serial connection to share commands but eventually realised it would be silly not to use MIDI. Especially when there are Arduino built upon the AtMega32u4 that would just be recognised like a normal midi input device in the Pi, and any other PC the DigiBone could be plugged into.

Tonight I've stumbled across OpenDeck, which packs some fantastic open source software to simplify the whole process.

https://github.com/paradajz/OpenDeck/blob/master/README.md

I'm looking forward to putting this to use on an Arduino tomorrow.