05/03/21 · Roland has introduced the JD800 Model Expansion, textures, basses, etc Surpassed 100% by Jd990, much better synth Maxim Korobov March 6, 21 at 250 am Reply Strange that they not inclide JD990 wavesforms and FXM On, no strange Wil be available as separated purchase in near future OR you can be subscribed Henri March 6, 21 at 347 amBut with most now using a combination of samples and synthesis, manufacturers are having to look for different ways of combining technology to come up with newsounding instruments The JD990 subtitled the Super JD is a case in point It's a 2U high rackmount module based on Roland's flagship JD800 synthesiser, but with high expandability, new algorithms and newThe Roland Super JD (JD990) is a 2U rack (aftertouch and velocity sensitive), 624 voice (48part multimbral), digital synthesizer, featuring 14 oscillators (195 samples with ringmod and sync) per patch (192 patches, 64 editable), resonant lowhighband pass filter, dedicated (3stage) pitch,