As a Ph.D student in engineering physics at Cornell University, Moog -- rhymes with vogue -- in 1964 developed his first voltage-controlled synthesizer modules with composer Herbert Deutsch. By the end of that year, R.A . Moog Co. marketed the first commercial modular synthesizer.
The instrument allowed musicians, first in a studio and later on stage, to generate a range of sounds that could mimic nature or seem otherworldly by flipping a switch, twisting a dial, or sliding a knob.