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The RCA Mark II Electronic Music Synthesizer, designed and built by Harry Olson and Hebert Belar at RCA's Sarnoff Laboratories in Princeton, New Jersey, in 1957, was basically a vacuum-tube based synthesizer controlled by a punched paper tape. It was purchased in 1959 with a grant from the Rockefeller Foundation to be installed in the newly formed Columbia-Princeton Electronic Music Center.

Milton Babbitt said: "The notion of having complete control over one's compostion, of being complete master of all you survey ... to hear one's music as it was conceived ..."

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Left: Milton Babbitt at the RCA Mark II Electronic Music Synthesizer in the Columbia-Princeton Electronic Music Center, circa 1960. Courtesy Milton Babbitt.

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