Pitch bend would give you 14 bits (per MIDI channel). The key question is what can your unit record and send. Once we know that we could probably write routines to store and retrieve limited amounts of data if we want. BTW, I’ve asked Florian for the capabilities to store and retrieve global variable in a file “save set”. I know he has a lot on his plate though. I could probably write something for the Arduino given time but it would be cleaner if MT Pro (and BomeBox) could do it stand-alone.