Jupiter 4
1978–1981
The Roland Jupiter-4 (JP-4) was an analog synthesizer manufactured by the Roland Corporation between 1978 and 1981. It was notable as the company's first self-contained polyphonic synthesizer, and for employing digital control of analog circuits (termed compuphonic by Roland), allowing for such features as programmable memory, voice assignment modes, an arpeggiator, polyphonic portamento and others.
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