What to expect: It's hard to really sum up this fest, what with all the different performances, installations and broadcasts on display at multiple venues. But let's just say you should prepare to be amazed. Upcoming events include an evening (November 12) of optical audio films at the Siskel Center and Brett Ian Balogh's "Chora," a computer-controlled installation playing at Audible at ESS November 13-December 13. Check out the website for full details.