John Cage / David Tudor ‎– Indeterminacy: New Aspect Of Form In Instrumental And Electronic Music

Originally issued in 1959 as Folkways FT 3704.
"The idea behind Indeterminacy was, like many Cagean ideas, essentially simple and audaciously original. Cage read 90 stories, his speed determined by the story's length. In another room, beyond earshot of Cage, David Tudor, pianist and veteran Cage collaborator, performed miscellaneous selections from Cage's Concert for Piano and Orchestra and played pre-recorded tape from Cage's Fontana Mix."