The Medusa myth profoundly influenced the musical shape that Dark Angels would assume. Its pages bear the scars of Medusa's transformation, and the bitter metaphors associated with her suffering. Aaron Copland's Clarinet Concerto was commissioned by jazz clarinetist Benny Goodman in 1947. The concerto quickly established itself as a standard piece in the clarinet repertoire. Tchaikovsky’s Fifth Symphony demonstrates how convincingly he could create a large–scale symphonic work of complete technical assurance and structural equilibrium, yet wholly his own in expression.