I have been working with Arduino for around a year. I am very interested in synthesizers (both analog and digital) and various other musical instruments. I had been fooling around with the code to Auduino
--a basic “direct digital synthesis” grain synthesizer for some time. I had a few half-finished projects where I modified acoustic and electric guitar bodies with softpots and capacitive sensing metal buttons to control notes. I felt limited by the monophony of Auduino, so I started to work on ways I could do polyphony or expand the sound. Arpeggiating notes turned out to sound very good, and the idea grew from there.