Les Paul (born Lester William Polsfuss on June 9, 1915) is an American jazz guitarist and inventor. He is a pioneer in the development of the solid-body electric guitar which "made the sound of rock and roll possible."[1] His many recording innovations include overdubbing, delay effects such as "sound on sound" and tape delay, phasing effects, and multitrack recording. http://en.wikipedia.org/wiki/Les_Paul