Noah speaks with Golan Levin, creator of "The Dialtone Symphony." For this symphony, 200 members of the audience will be holding cell phones, each programmed with a different pitched ring. Levin will be dialing the phones from the stage via computer — creating a symphony of ringing sounds. The concert takes place on Sept. 2, 2001 in Linz, Austria. Golan Levin is an artist in residence at the Ars Electronica Center in Linz, Austria. (6:00) To hear sound files, go to www.flong.com/telesymphony.