Incidental music is music intended to accompany some art form not primarily musical, such as theater, TV, radio, video games, movies, etc. Incidental music may range from drones and other interventions bordering on the definition of 'sound effect', to well defined pieces such as overtures, interludes, etc. The use of incidental music dates back to Greek drama, and many well known composers in Western music history have written incidental music for plays, such as Ludwig van Beethoven's Egmont music, Franz Schubert's Rosamunde music, Felix Mendelssohn's Midsummer Night's Dream music, Georges Bizet's L'Arlésienne music, and Edvard Grieg's music for Henrik Ibsen's Peer Gynt.