Roland Super JD 990

via this auction


JD-800 in a rack. Anyone know if you can edit this with all sliders and knobs on the JD-800 and if so does it change all settings or just the parameter you are editing? It would be a bit annoying if it changed everything. I know the Juno-106 will change all parameters if you just edit one.

Differences between JD-800 and JD-990
*Wave ROM was expanded to 6MB (vs 4MB on JD-800) with 195 PCM waveforms (vs 108 on JD-800) and that includes some waveforms transferred from JV-80 probably to make them soundwise more compatible.
* Additional card slot to use a 8MB expansion boards from SR-JV series.
* The LFO section got additional waveforms: sine, trapezoid and chaos.
* Next addition is the osc sync function which lets you synchronize two oscillators, a feature found in many analog synthesizers.
* Then comes the FXM, which stands for Frequency Cross Modulation - again found in some analog synthesizer, for example in JX and Jupiter series (although a little bit different there). It has 8 positions (named colors) that actually control the frequency of the modulating signal, and a depth setting 0 - 100 that controls the amplitude of the modulating signal.
* Next feature is (again from analog synth era), the famous ring modulation, for creating all kind of metallic percussions and strange efx.
* This synth features 6 types of ''structures'' which among many other things let you stack two filters in series, for building complex filter textures.
* Outputs increased to 8 total.
* Polyphonic portamento.
* Tempo sync delay.
* For all above reasons, it was named the Super JD.