Dialtones (A Telesymphony) (2001-2002: Golan Levin, Gregory Shakar, Scott Gibbons, Yasmin Sohrawardy, Joris Gruber, Erich Semlak, Gunther Schmidl, and Joerg Lehner) is a large-scale concert performance whose sounds are wholly produced through the carefully choreographed ringing of the audience's own mobile phones. Before the concert, participants register their mobile phone numbers at a series of
![YouTube - Mobile Phone Concert: Dialtones @ Ars Electronica 2001](https://cdn-ak-scissors.b.st-hatena.com/image/square/419304c621714a42c439f1bcf2367c36a8452822/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2Fg1G-YesiBB8%2Fhqdefault.jpg)