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The Clavivox was a keyboard sound synthesizer and sequencer invented by American composer Raymond Scott in 1952, and patented in 1956. (U.S. Patent 2,871,745) Scott had earlier built a theremin as a toy for his daughter Carrie. In his first Clavivox prototype, he used a theremin module built by a young Bob Moog (who was more than 25 years younger than Scott). The unit allowed the use of portamento over a 3-octave range. Scott then added amplitude envelopes, vibrato and other effects to the Clavivox. Later Clavivox models used light shining through photographic film onto photocells as a source of control voltage to control pitch and timbre. "A lot of the sound-producing circuitry of the Clavivox resembled very closely the first analog synthesizer my company made in the mid-'60s," Moog explained years later. "Some of the sounds are not the same, but they're close." See also ANS synthesizer Sound synthesis External links Photos of Raymond Scott's various CLAVIVOX designs Sound file: Raymond Scott demonstrates his CLAVIVOX Bob Moog's memories of Raymond Scott & the CLAVIVOX, in Moog's own words Circle Machines and Sequencers, article from Electronic Musician magazine, written by Jeff E. Winner & Irwin D. Chusid This article relating to electronic musical instruments is a stub. You can help Wikipedia by expanding it. v • d • e