Composers create and arrange musical scores for anything that requires a soundtrack. The scores written need to be technically correct in order to create flawless performances by choruses, musicians or instrumental ensembles. Sound recordings produced from the score vary in style and may reflect the classical, country, folk, jazz, techno, or pop genres. The score might bring mood or emotion to a dramatic scene in a play, or provide a tempestuous backdrop for a ground-breaking action scene in a film or video game.