Differences between JD-800 and JD-990

 The JD-990 is the Supermodule of the JD-800. It have extended capabilities and is a "big plus" to any setup.

1. Expanded wave ROM (6MB vs. 4MB)
2. Ability to use a 8MB expansion board
3. 4 additional outs
4. True stereo engine
5. Osc sync
6. Cross-mod (FXM)
7. Osc structures that allow ring mod 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 multi-timbral slots
14. One patch can keep full effects in multi mode

For the complete comments by Don Solaris and some DEMOS of the JD-990 visit:Roland JD-990 info and synthesis examples

Thanks to Ian and Don Solaris for this part.