Hello,
i've just discovered this cool project:

http://mintysynth.com
https://www.youtube.com/watch?v=iLRkF6HjFzM

I don't think I can easily get a kit because I'm not in USA, but at least maybe I'll try to make a derivative version from a regular arduino...

I've looked at this awhile ago, and it would be very doable on a Arduino. Mainly the project is about fitting into a tin, and if you aren't worried about that should be able to wire up the pots and switches easily. Seems fun
Yogi