I’ve been playing with Sonic Pi and sensors for a while, and keep forgetting to record and keep the actual wired-up thing.
I tried cam/gestural but it didn’t feel like an instrument, piezo was too antsy, so am playing with switches on recorder. The code is full of extra bits, ignore! Thought somebody might interested in how you can play with an arduino, Sonic Pi wire and gaffer tape as a beginner hacker with no soldering iron handy (probably just as well). Blue vet tape is great for instruments, as it holds without sticking.
Samples: Sonic Pi :guitar_harmonics + recorder.
Keen to meet other instrument hackers 
