The USS-1 was not a synthesizer, but was one of the first multi-effects devices. The USS-1 included the following sound modification features: a unique fuzz circuit, a voltage controlled synthesizer-type filter, sample/hold, an envelope follower, a PS-1A phase shifter, and an octave divider all in one box. The unit was used extensively by guitarist Wah Wah Watson for Herbie Hancock’s mid-70’s fusion albums, among others.