The Thingamagoop has a stereo 1/8″ jack on the side to facilitate control voltage in and out. You can make your own cable very simply or order a nice, shielded one from us. Here’s Dr. Bleep and his band, The Hearts and the Minds, using the Thingamagoop 2 to control a Moog Prodigy (CV out of Thingamagoop 2 to the osc in of Prodigy).
Check back tomorrow for more info on Arduino integration!