David Richard Campbell (born February 7, 1948) is a Canadian-American arranger, composer and conductor. He has worked on over 450 gold and platinum by artists of a wide range of genres, including Ariana Grande, Harry Styles, Muse, Michael Jackson, Aaliyah, Evanescence, Sebastián Yatra, Beyoncé, Aerosmith, Garth Brooks and various albums by his son Beck.