For all its apparent simplicity John Cage's seminal 4'33'' ('Four, Thirty-Three') continues to stimulate, provoke, enrage and delight audiences nearly 70 years after it was composed. The premiere of the three-movement 4'33'' was given by David Tudor on August 29, 1952, at Woodstock, New York as part of a recital of contemporary piano music. The audience saw him sit at the piano and, to mark the beginning of the piece, close the keyboard lid. Some time later he opened it briefly, to mark the end ...