Lester William Polsfuss (June 9, 1915 – August 13, 2009)[4][5]—known as Les Paul—was an American jazz, country and blues guitarist, songwriter, luthier and inventor. He was one of the pioneers of the solid-body electric guitar, which made the sound of rock and roll possible.[6] He is credited with many recording innovations. Although he was not the first to use the technique, his early experiments with overdubbing (also known as sound on sound),[7] delay effects such as tape delay, phasing effects and multitrack recording were among the first to attract widespread attention.[8]