Thanks for the great image Bluebird.
Doesn't have separate buttons to change bass, drums, and other accompaniment instruments.
Roland is very generous with outputs. 2 headphone jacks (in the front, I like that) and one audio out. My Yamaha PSR550 has only 1 output jack.
The headphone jacks kill the speakers when used (as it should) but do not when plugged into the line output.
Starkeeper