Today in Improv Ensemble with John Ritz, I drew in Photoshop to the music the rest of the musicians (and I am allowed to say that because they call me a musician! <3 <3 <3) improvised some various collaborations. I keep learning new words when I hang out with them... like ostinato, which I'd heard before but never really understood. Delightful. At any rate, this is the piece that was the result of the A/V collaborative process.
I'm not saying I think it's stellar, but it did happen in real time to music, and in front of a small audience as well.