I am new to digital ensembles, coming from an acoustic piano rather than a keyboard background. I am ploughing my way diligently through all of the Technics keyboard videos, but the PR604 is different and completely unsupported in the secret of its differences. Is there anybody out there who is also trying to explore the possiblities of the PR604 and understand its idiosyncrosies? Can anybody make head or tail of the atrocious unsers manual? I have joined the Technote Club and find its magazines very helpful, but again there is the problem that most stuffis aimed at the KN6000/6500 owner and doesn't explain where and how the PR604 diverges.