Roland JD-990

The Roland JD-990 is a module version of Roland JD-800 synthesizer with expanded capabilities. JD-990 is a multitimbral synthesizer utilizing wave-table 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 multitimbral 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, also known as Super-JD, had the following features which were not available on the JD-800:

  1. Expanded wave ROM (6 MB vs. 4 MB)
  2. Ability to use a 8 MB expansion board
  3. 4 additional outputs
  4. True stereo engine
  5. Oscillator sync
  6. Cross-modulation (FXM)
  7. Oscillator structures that allow ring modulation and serial dual filters
  8. Additional LFO waveforms
  9. MIDI CC control of parameters
  10. Tempo-sync delay
  11. Polyphonic portamento
  12. Performance memories
  13. Additional multitimbral slots
  14. One patch can keep full effects in multi mode



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