Dave Barker (born David John Crooks, 10th October 1947, Kingston), a session vocalist, and Ansell Collins (born 1949, Kingston) , a keyboards player, were working for producer Lee "Scratch" Perry in Kingston, Jamaica in the late 1960s, and joined forces in 1971, for the ska single "Double Barrel". Released on Techniques Records, part of the Trojan Records label, it topped the Jamaican and U.K. charts in March that year. It was the first record the celebrated drummer, Sly Dunbar, ever played on; he was aged fourteen at the time. Read more on Last.fm