Roland Jupiter-4

Roland Jupiter-4
Roland Jupiter-4 Compuphonic
ManufacturerRoland
Dates1978 - 1981
PriceUS$2,895
GB£1,810
JP¥385,000
Technical specifications
Polyphony4 voices
TimbralityMonotimbral
Oscillator1 VCO + 1 sub-oscillator per voice
LFO1 triangle/square/sawtooth/reverse sawtooth
Synthesis typeAnalog Subtractive
Filter1 resonant lowpass, 1 highpass
Attenuator2 ADSR
Aftertouch expressionNo
Velocity expressionNo
Storage memory10 presets/8 user patches
Effectschorus
Input/output
Keyboard49 keys
External controlNone

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.

Priced at US$2,895, it was dramatically cheaper than other polyphonic machines from its competitors (such as the Yamaha CS-80, Korg PS-3300 Prophet-5 and OB-X). While it didn't sell as many units compared to the competition, its primary design was such that it could be an accompaniment to organs, complete with an option for a music sheet stand to be fitted.[1] Its future successor in 1981, the Jupiter-8, would go on to sell many more units and make Jupiter a recognized brand.

  1. ^ "The History of Roland: Part 1".