I've been googleing and googleing on an endless search, but I can't seem to find anything that does what I want, maybe you guys know of something.
I want something that plays rhythms and bass lines, but it should be able to change the pitch / chord for the bass lines through midi, and have the ability to add fills, all of this should be easilly accessible live! The RD700SX is closest thing I've seen that can do this, but I was wondering if there was anything less expensive, either a box (rhythm box maybe), module, or maybe software, that could do this same job. It is for live piano playing, so that I can add bass and drums, without having to use pre-sequenced songs, or an extra arranger keyboard on the side.

Anyone?

Doc-Z