That sounds interesting, I play guitar and usually compose rock styled music
not sure if it'd be the style that you're looking for. I would love to help out with this but I would need to see some solid development with your projects so that I know I am not going to be wasting my time. I am still lacking the experience with my music software, so I'm unsure if I'm ready to do something like this plus I'm a bit busy with other small projects.
But if your project is of a good standard I am somewhat interested, what format would you be looking at here? Audio or midi?