One of Aaron Copland’s first significant works upon returning from his studies in Paris was the necromantic ballet Grohg. This ballet, suggested to Copland by the film Nosferatu, a free adaptation of the Dracula tale, provided the source material for his later Dance Symphony. Copland composed three numbered symphonies, but applied the word “symphony” to more than just symphonies of typical structure. He rewrote his early three-movement Organ Symphony omitting the organ, calling the result his First Symphony. His fifteen-minute Short Symphony was the Second Symphony, though it also exists as the Sextet. His Dance Symphony was hurriedly extracted from the earlier unproduced ballet Grohg to meet an RCA Records commission deadline.
Read a review of Copland conducting himself in 1975 in The New York Times here.