sk880user,

;-) I am not a professional synthesizer user, I have used a WX2 for three years (but didn't use the styles...), and only a few months ago I got my first synth. Programming takes much, much time (I don't do it often, even on the Equinox, I only created four, five sounds in three weeks) but it is really cool (if you like it of course).
Start with the simple things and take a few nights to learn. Maybe it is nothing for you - programming and playing are two different things. I myself am a software engineer, so I like this kind of stuff: on the other side I'll never become a real music player. For me, playing is a hobby.

But, getting back to the point, how is the documentation of the sk880 regarding the synthesizer engine?

Btw, sometimes I get the feeling that there are users of this keyboard discussion that think the name "GeneralMusic" stands for "Generic", and post all kind of questions (not related to GEM).