The new "session styles" from the 2000 and many from the new CVP models are only compatable in the 1000, 2000 and new CVP207 and 209. If you try to load these session styles into the 9000 or 740, they will not show up. These new session styles have much more "in your face" bass patterns and style programming and I believe this is some of the new direction of the Yamaha programmers. I was playing one of the new styles on my 2000 at the store tonight (it was one of the Jazz styles from the CVP209 library) and I noticed that if I didn't change chords just a touch ahead of the downbeat, a slight glitch would occur. I remember reading about the Korg PA80 having this problem on some of it's buzier styles. Korg explained that this was just the complexity of numerous tracks and not a problem in the keyboard. Yamaha engineers told me earlier this year that their direction in making more complex styles would at certain times cause these kinds of glitches in the playing of these styles. It seems it's just the price you pay for more exciting styles. All in all, the walking bass lines, etc. are much more exciting in some of these new "session" styles.
George Kaye
Kaye's Music Scene
Reseda, california