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Roland Super JD-990

Rackmount Sound Module/ Tone Generator

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Super JD-990 1
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Roland Super JD-990
Roland Super JD-990
650.00 street price

Super JD-990 is a module version of JD-800 though it features some specs not introduced in the keyboard prototype. The module was released in 1993. The instrument offers 24 voice of polyphony and its core is represented with digital sample-based subtractive synthesis. The unit features the same TVF and TVA.

Among the expanded capabilities there can be named quite many. ROM was enlarged and gives 6MB. An 8MB expansion board can be used and JV-80 patch import became available. The oscillator sync function was added as well as 4 extra outputs. Each tone can be panned independently within a program. In JD-990 many modulation options are available: frequency cross-modulation, ring modulation, one destination can be modulated from various sources. LFO section got more waveforms including sine, trapezoid and chaos.

Basic waves got some pitch modulation added for drifting analog character. Tempo sync delay and polyphonic portamento are delivered as well. Multi mode allows for applying all the effects for one patch at once. The structure provides you with 6-part multitimbrality (+ one drum part).

Tags: digital synthesizer

Country of origin / production: Japan

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More info
Usage area
Sound Module/ Tone Generator 
Usage Design/ Form Factor
Rackmount, 3U 
Digital (D) 
Multi Timbral Capacity6 part(s)
Tone Generator / Sound Synthesis
Synthesis Method Digital Subtractive
Oscillator Type Digital
Technology of Sound Generation PCM
LAS (Linear Arithmetic Synthesis) 
Waveform/ Spectral form (main generator): Waveform Count195
Waveform/ Spectral form (main generator): Waveform ROM6 Mb
Programs/ Voices/ Timbres
Drum Kits Preset3
Digital (DCF) 
High-pass Filter (HPF) 
Low-pass Filter (LPF) 
Band-pass Filter (BPF) 
MIDI in/ out
DAC Frequency 44.1
Resolution16 bit
Case/ body
Production start1993
Production end1996
Production ended

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  • enpdf1.32Mb Roland JD-990 Patch List
  • enpdf28.56Mb Roland JD-990 Reference Manual
  • enpdf6.18Mb Roland JD-990 Users Guide