Don Bartley began his mastering career at ARC/CBS in 1971, moving to RCA in 1975 and EMI’s Studios 301 in late 1980. His work there included the celebrated 1983 Australian audiophile edition of Sgt. Pepper’s Lonely Hearts Club Band, bringing him full circle to the album that had helped inspire his career. He became a freelance engineer in 1988 and established Benchmark Mastering in 2006, building an extensive catalogue of work with Australian and international artists.