Leon's Home PageCheck this online music notator Flat.io Notator
Interview with Mark Hutchins
A kind of reverse play along where instead of the rhythm tracks being there and the top line instruments play along, the top line is there for rhythm players to vamp along and fill out. They won't be able to drive the pace, but that's a skill that Rhythm players can do well to practice.
Click the piano over there to play Rhythm along with set top line standards.