Variations VII performed by John Cage as one of the 9 Evenings: Theatre & Engineering at the 69th Regiment Armory in New York City in 1966. The composition was the next to last of John Cage's series of indeterminate works that he had begun in 1958, which made increasing use of electronic equipment and systems. The DVD documents the only complete performance of Variations VII and also presents a stereo audio of the full 85 minutes of the performance. 9 Evenings was the series of innovative dance, music and theater performances that were the result of collaborations between artists and the engineers and scientists from Bell Telephone Laboratories.