Who designed the RCA Electronic Music Synthesizer?

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The RCA Electronic Music Synthesizer was designed by American acoustical engineers Harry Olson and Herbert Belar at the Radio Corporation of America (RCA) laboratories in Princeton, New Jersey.123

Introduced in 1955, the device was a large, experimentally oriented instrument designed for research into the properties of sound. It functioned by reading instructions encoded in binary form on a perforated paper roll, allowing composers to specify musical properties such as pitch, tone color, and envelope shapes with high precision. A second, improved model—the Mark II—was installed at the Columbia-Princeton Electronic Music Center in 1959 and became famously associated with the work of composer Milton Babbitt.123