I asked the same thing years ago and I was sent here
https://www.youtube.com/watch?v=WVapN3zbhRk
these two guys go through most of the patches...excellent product, especially if you like what has been described to me as the "Roland" sound ethos, but I remained agnostic
https://www.youtube.com/watch?v=RVt3D63 ... KQdXFXXL18
https://www.youtube.com/watch?v=1KEvOmH ... groBvfg32e