Karlheinz Stockhausen (1928- 2007) is a huge figure in modern music composition. He's been called one of the great visionaries of 20th century music.
The reading is an interview from 1995 where Stockhausen was sent music from four contemporary electronic musicians and then asked to comment on their work. He was not very impressed. The title of the interview is Advice to Clever Children. He was sent music from Aphex Twin, Plastikman, Scanner, and Dan Pemberton.