Born in Greenock, Scotland. Played trumpet with Kenny Graham's Afro Cubists changed to tenor sax became a jazz studio player. Played with almost everyone in show business. He has worked (often as a featured soloist) with Henry Mancini, Robert Farnon, Benny Goodman, Gil Evans, Bill Holman, Nelson Riddle, Peggy Lee, Frank Sinatra, Tony Bennett, Bing Crosby, Count Basie, Fred Astaire, Benny Carter, Mel Torme, Paul McCartney
the list is endless.
The Young Person's Guide to the Jazz Orchestra, The Carnival of the Animals, Soho Suite (commissioned for The Soho Festival), Sherlock Holmes Suite commissioned for the festival of London with Sir Spike Milligan, Cinderella, Carmen, Buddy Rich Suite and many others. His most recent being Porgy and Bess with an all-star orchestra. Duncan has arranged and conducted for the B.B.C. for many years and has recorded as a soloist and an arranger with the Metropole Orchestra. His suite Beautiful Ireland for the Ulster Youth Jazz Orchestra was performed at the Londonderry Jazz Festival.