Roland JD-990

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JD-990 Super JD
JD-990
JD-990
Manufactured by Roland
Dates 1993-1996
Price US$2,195
Technical specifications
Polyphony 24 voices
Timbrality 6 + 1 Drum part
Oscillator 6MB of PCM ROM with 195 waveforms (expandable to 16MB), 4 waveforms (tones) per patch
LFO 2 per patch
Synthesis type Digital Sample-based Subtractive
Filter TVF (Time Variant Filter): Lowpass/bandpass/highpass-filters with resonance
Attenuator TVA envelopes, TVF envelopes and pitch envelopes
Aftertouch Yes
Velocity sensitive Yes
Memory 3 banks of 64 patches (expandable), 3 drum kits with 61 sounds
Effects Chorus, Reverb, Delay, Phaser, Spectrum, Enhancer, Distortion and EQ
Input/output
Keyboard No
External control MIDI

The Roland JD-990 Super JD is a module version of Roland JD-800 synthesizer with expanded capabilities, which was released in 1993. JD-990 is a multitimbral synthesizer utilizing 'wave-table' sample-based synthesis technology. It is equipped with 6 MB of ROM containing wave-table, four sets of stereo outputs that are assignable to individual, internal, instruments, and standard MIDI in/out/through ports. JD-990 has a large LCD display and programming takes place through a keypad on the front panel of the unit. The unit can generate multi-timbral sounds reminiscent of the vintage analog synthesizers but is also capable of generation of modern digital textures. There are several expansion boards available for JD-990 that can be installed in the provided expansion slot in the chassis of the unit.

The JD-990 had the following features which were not available on the JD-800:

  1. Expanded wave ROM (6 MB vs. 3 MB)
  2. Ability to use an 8 MB expansion board from the SR-JV80 series
  3. JV-80 patch import
  4. 4 additional outputs
  5. True stereo engine
  6. Individual panning of each tone in a patch
  7. Oscillator sync
  8. Frequency cross-modulation (FXM)
  9. Matrix Modulation
  10. Modulation of the same destination from multiple sources
  11. Oscillator structures that allow ring modulation and serial dual filters
  12. Additional LFO waveforms: sine, trapezoid and chaos
  13. MIDI CC control of parameters
  14. Tempo sync delay
  15. Polyphonic portamento
  16. Analog Feel. Adds a very subtle pitch modulation to the basic waveforms intended to recreate an analogue synth's 'drift'
  17. Performance memories
  18. Additional multitimbral slots
  19. One patch can keep full effects in multi mode

Factory Sounds[edit]

The Factory presets of the JD-990 were created by Eric Persing and Adrian Scott.

External links[edit]

References[edit]

Profile on Vintage Synth Explorer