It's not really a genre, per se. This sort of comes from Opera, and was generally referred to as Incidental Music. Music written specifically to accompany the a

It's not really a genre, per se. This sort of comes from Opera, and was generally referred to as Incidental Music. Music written specifically to accompany the action on screen or stage. You don't really see albums or collections, because it doesn't generally make sense without the visual context.