The vast majority of arranger keyboard players never really dig into the inner-workings of their boards. And in fact, most barely scratch the surface of what the keyboard can and cannot do. In reality, today's modern keyboards can do far more than than anyone could possibly imagine. They are extremely versitile, the sounds are incredible, and in the hands of an accomplished performer, today's keyboard provides audiences with superb, musical entertainment.
Keep in mind, however, that most arranger keyboard and synth user manuals are just plain awful. They are poorly written, have lousy illustrations, and at times many of the features are either glossed over or completely omitted.
Even with these shortcomings, the manual is a must read for everyone that purchases a keyboard or synth. Then, after searching the manual for the answers to complex questions, the next best option is to post those questions on various forums that deal with the specific keyboard. You'll usually get good information from users who have a fair degree of technical expertise, hence the creation of the various forums.
For me, the PA800 just didn't have what I wanted to hear, even after spending an hour playing with the inner workings. For now, I'll stick with the PSR-3000s.
Good Luck Donny,
Gary
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Travlin' Easy