American composer, music producer, and actor, best known for his work scoring films such as Insidious, 11-11-11, Dark Skies, and The Conjuring. Although his career began with the 1998 Biblical drama Joseph's Gift, he composes music for mainly horror and thriller films, and has collaborated several times with director James Wan. Projects by directors John Carpenter and Joseph Zito, and musicians Ray Manzarek and Diamanda Galás have incorporated his work. In addition to composing, he frequently appears in films he is involved in, usually made up as a demon or other supernatural creature. He has also been a producer on Repo! The Genetic Opera and other projects
