All the demos sound good. The whole keyboard to me though almost seems like the release is too abrupt. Is there any way to adjust the global release time and give it a few more milliseconds?
Also, I wonder about those string scrapes on the nylon guitar. Are those controllable? Like on Estrela; there were so many of those fret noise sounds it was distracting. Also, to tell you the truth, a real nylon guitar played in that range would have very very few fret noise scrapes, because almost the entire melody would be played on the non wound strings. It is only the top 3 wound strings on a nylon guitar that will give you that fret scrape. So as a guitarist, I was hearing a lot of scraping that wouldn't be there; so in the attempt to make a more realistic guitar, a less realistic guitar was actually achieved.