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Schoenberg was credited with it's creation, but Alban Berg started using Dodecaphony in 1912, three years before Schoenberg.
Schoenberg did, however, innovate the twelve-tone system.
Arnold Schoenberg Chor was created in 1972.
Arnold Schoenberg was born on September 13, 1874.
Arnold Schoenberg died on July 13, 1951 at the age of 76.
Arnold Schoenberg