Yeah, it seems like you might have more of a desire for live performance tools. Maybe even something simple like this:
http://www.youtube.com/watch?v=miMM8R1CSM8
http://www.youtube.com/watch?v=25VGdNU3nrU
which can produce really great results.
And once you're happy with the results, "record" the individual parts with a midi tool so you have the notes down someplace for recall later.