Aaron Copland
The famous conductor of the Boston Symphony Orchestra, Serge Koussevitzky, learned about Copland's music. Koussevitzky led the orchestra for the first performance of Copland's early work, "Music for the Theater", in 1925. Koussevitzky also conducted Copland's "Concerto for Piano and Orchestra" in 1927. This work was unusual because Copland used ideas from jazz music in his concerto.