Clocker

Clocker, for clock, galvanic skin response sensor and digital delay system, is a minimalist electronic music piece by Alvin Lucier conceived in 1978, though Lucier felt there did not exist an appropriate digital delay system till 1988: "With this new equipment, the sounds of the delayed clock now matched those of the original, creating clear copies and with them a more convincing illusion of time expanding and contracting. Later I added a bank of fixed delays which, as they splay out from the voltage controlled delay, create multiple reflections that almost convince the listener that the room is changing size."