Hi Anthony,

I have the KN6000 (upgraded). Don't know how my keyboard compares with your PR804 in terms of the technical features, but you said "any model", so I want to help if I can. I selected octave strings on Rt1, selected Sound Edit/Effects/Page 2 and I have a normal page presentation. The default setting is Celeste 1 and I can scan through all of the various effects options, change depth, speed etc. No garbly goop as you put it.

Regards, Chuck