Richard Chowenhill is a BILLBOARD charting producer, mastering engineer, mix engineer, composer, and guitarist. He is the head engineer and owner of Sunset Mastering in Los Angeles. His music for the concert hall, and music for the theater have been performed the world over. He currently performs and records with the ecstatic black metal band Agriculture, and the extreme music collective Ehnahre. Richard has completed programs of study at the University of California at Davis, Brandeis University, and Berklee College of Music.