Had it for a few days ( http://forums.rolandclan.com/viewtopic.php?f=54&t=48967 ). My plan was to program it fully, had to give up on this. On the one hand the possibilities (or should I say the complexity) are huge. But there are things in it that are too perfornance-wise. Mainly the fact that selecting a patch means changig the FX connected to it. Probably one could go around this by good programming. That was my problem, in contrast to programming that little sound canvas SD-50, the I7 would have taken like 6 months to write a midi-tracker for it. I guess the sound is really good. There are a lot of yt videos demoing the patches.
ONly downside .is that the supernatural synth tones are sample basedare sample based , but the filters sound pretty damn nice .
And of course the good ol’ pcm engine .
It really isn’t complex at all , the pcmsynth engine is what , almost 30years old …it gives you some crossmodlation between partials and an average souding filter …but like I said .;the supernatural filters sound GOOD .