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In page Record producer:

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In the 1920s and 1930s, A&R executives, like Ben Selvin at Columbia Records, Nathaniel Shilkret at Victor Records, and Bob Haring at Brunswick Records became the precursors of record producers, supervising recording and often leading session orchestras.[3] During the 1940s, major record labels increasingly opened official A&R departments, whose roles included supervision of recording.[2] Meanwhile, independent recording studios opened, helping originate record producer as a specialty.[citation needed] But despite a tradition of some A&R men writing music, record production still referred to just the manufacturing of record discs.[3]