Coppola played the flute. He studied at Juilliard, later at the Manhattan School of Music and privately with Joseph Schillinger. During the 1940s, Coppola worked under Arturo Toscanini with the NBC Symphony Orchestra. Then in 1951, Coppola left the Orchestra to pursue his dream of composing music. During that time he mostly worked as an orchestra Conductor on Broadway and elsewhere, working with his son, filmmaker Francis Ford Coppola, on additional music for his Finian's Rainbow.