As a kid with a lust for music, I was rocked by the Moog synthesizer sounds of 1968’s Switched-On Bach. I needed to learn how to make those sounds! Thus began a lifetime of learning and synthesizer making … I wanted to provide them with a kit that was simple to assemble [PDF] and use but still a fully fledged music synthesizer.
The result was the US $30 ArduTouch. This project incorporates, on a single board, a touch keyboard, an ATMega328P (the same processor used in the Arduino Uno), and an audio amp with a speaker. It also has a software library that can serve as an entry point into the world of digital signal processing.