The BBC has published online a brief feature, with audioclips, about music experimentation, titled "Sex Drugs and Four Minutes of Silence." To borrow a now infamous bit of BBC phraseology, the title unnecessarily sexes up a story that stands on its on merits. It's an interesting collection of brief interviews, including the late John Cage recounting the epiphany he had as a result of entering an anechoic chamber, an entirely soundproof room. Found at Disquiet.com