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In 1964, Donald Buchla developed one of the first analog modular synthesizers. The modules, such as oscillators, filters, envelope generators, amplifiers, and mixers, were mounted together in a wooden case and connected via patch cords. Buchla's system also included a keyboard that could simply be touched to trigger a note and a sequencer that allowed a composer to program a series of sounds to play automatically.

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The photo at the left is an example of the Buchla Modular Electronic Music System Series 200, available during the late 1960s. Courtesy Donald Buchla.

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