I just wonder if there are some nice hidden voices inside that s900 that we just can't get to. My brother had an old Yamaha something or other and I can't remember what model. But there was some weird thing we used to do with the sequencer; where we could actually skip past anything we had sequenced. There was a bunch of just random sounding stuff and there were different voices. Even a couple different styles. If you stopped the sequencer at the right spot, then just pressed the start button as if you were going to play, you could use these new styles and voices. It was the strangest thing ever, and it was so long ago that I don't remember how exactly we did it. But there were definitely other things in that keyboard that you couldn't get to in normal operation.