What was that about using a midi sequencer with Quartz Composer?
Quartz Composer can read incoming midi notes or controller values to control a composition. Using a sequencer like Ableton Live (www.ableton.com) or Numerology (www.five12.com) you could build a very powerful custom visuals environment without a single line of code. Use the sequencer to trigger clips and control effects on a timeline and QC as a 3d accelerated rendering engine. I am currently in the process of building this exact setup for a future AVSet. Some information and tricks I’ve learnt can be found in a series of articles on AVSync that I’ve written for quartonian.net.