See Legowelt’s DIY synth, the ‘Star Shepard’ [Watch] The Star Shepard is comprised of old guitar pedals, a Casio 403 keyboard from 1981, an AM radio, and plywood assembled with screws, glue, and tape. Related Posts: Trent Reznor shares fifty-year love affair with Moog synthesizers in new book excerpt Moog’s Subharmonicon semi-modular analog synth hits the market