Andy Hayleck (b. 1972) composer/musician and recordist. Explores the aesthetics of sound, especially regarding how sound is perceived by the ear. He uses extremes of volume, pitch, and sound complexity, and variations in change over time. For the past few years he has concentrated on using unamplified bowed metal (cymbalsand saw) in performance and using contact mics, hydrophones and regular mics in recording. Although he has used a computer for many years, recently he has begun to use one live.