“Harmony Box is a synthesizer that has the rules of modal jazz built-in; you press a key, it plays the right chord. You just pick the key and the mode. An alias-free oscillator drives a self-oscillating filter and it has LFOs and Envelopes for fatness.
Harmony Box (aka JAEZZESiZER) was created by Mike Massberg and Dave Gamble for Music Hack Day 2009.”
Dave and Mike: http://davenoise.com/blog/