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Lester William Polsfuss (June 9, 1915 – August 13, 2009[3][4])—known as Les Paul—was an American jazz and country guitarist, songwriter and inventor. He was a pioneer in the development of the solid-body electric guitar which "made the sound of rock and roll possible".[5] He is credited with many recording innovations. Although he was certainly not the first to use the technique, his early experiments with overdubbing (also known as sound on sound),[6] delay effects such as tape delay, phasing