David studied at the Royal Academy of Music. His choices of instruments were oboe and English horn. He made 4 albums for Capitol: "Music...A Part of Me", "Music: A Bit More of Me", "Music-It's Happening Now", and "McCallum". All 4 were produced by the legendary David Axelrod and arranged by the equally redoubtable H.B. Barnum. He composed many of the tracks.