|JD-990 Super JD|
|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|
|Storage memory||3 banks of 64 patches (expandable), 3 drum kits with 61 sounds|
|Effects||Chorus, Reverb, Delay, Phaser, Spectrum, Enhancer, Distortion and EQ|
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 wavetables, 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 analogue 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:
- Expanded wave ROM (6 MB vs. 3 MB)
- Ability to use an 8 MB expansion board from the SR-JV80 series
- JV-80 patch import
- 4 additional outputs
- True stereo engine
- Individual panning of each tone in a patch
- Oscillator sync
- Frequency cross-modulation (FXM)
- Matrix Modulation
- Modulation of the same destination from multiple sources
- Oscillator structures that allow ring modulation and serial dual filters
- Additional LFO waveforms: sine, trapezoid and chaos
- MIDI CC control of parameters
- Tempo sync delay
- Polyphonic portamento
- Analog Feel. Adds a very subtle pitch modulation to the basic waveforms intended to recreate an analogue synth's 'drift'
- Performance memories
- Additional multitimbral slots
- One patch can keep full effects in multi mode
The Factory presets of the JD-990 were created by Eric Persing and Adrian Scott.
- "The History Of Roland: Part 4". www.soundonsound.com. Retrieved 2018-07-17.