He had another piece with the instrumentation being several radios. They were tuned to predetermined frequencies that may or may not be the frequency any local radio stations. A backstage engineer would choose which radio or radios to connect to the concert hall amplification system at any given time during the performance.
He was on Terry Gross's Fresh Air at one time. She asked him if he had any idea what a piece was going to sound like when he composed it. He answered, "no" with such an incredulous tone of voice, as if that were the stupidest question imaginable. As far as I'm concerned his work does not challenge the definition of music; rather it is a body of examples of what is not music.
