Les Paul was a pioneering American jazz, country, and blues guitarist, songwriter, luthier, and inventor. He is one of the most influential figures in the development of modern electric guitars and popular music. Les Paul was a major influence on the development of rock and roll, and his innovative use of multi-track recording revolutionized the recording industry. He is credited with inventing the solid-body electric guitar, which made the sound of rock and roll possible. He also pioneered the use of overdubbing, delay effects, phasing, and other recording techniques.