Watch Sadisflix. In 1975 the composer Robert Ashley embarked on an ambitious work titled Music With Roots in the Aether. He called it an Opera (or piece of theater depending on the case) for television. The work is comprised of seven, two hours sections. Each “episode” is dedicated to investigations, interviews, and performances of his one of his peers – David Behrman, Philip Glass, Alvin Lucier, Gordon Mumma, Pauline Oliveros, and Terry Riley respectively, with the final reserved for himself.