Mazurka Journal des Demoiselles/Wikimedia Commons hide caption

itoggle caption Journal des Demoiselles/Wikimedia Commons

Czech composer Leos Janacek sent a non-stop stream of more than 700 love letters to a much younger, married woman; she inspired many of his best works. iStock hide caption

itoggle caption iStock

Aaron Copland captured the sound of America's wide open spaces with surprisingly simple techniques. iStock hide caption

itoggle caption iStock

Composer Steve Reich's Music for Mallet Instruments, Voices and Organ has a percussive motor that never stops. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist