Thanks for your reply's...A number of the stated styles switch voices on the minor or seventh chords, you can see this voice changing on the 9000 screen if you are in the style editing page at the time, although this voice change does not show its self in Cakewalk if the file is examined. Possible some System Exclusive to the hardware on PSR2000 & CVP209 ???
Example...Style file Swingin Boogie, BASS part switches to BRASS when playing Minor Chords.

Graham UK