Later numbers incorporated squealing rock guitar and blues harmonica into the mix, with uneven results.

He incorporated his signature call-and-response style of alternating vocal passages with pungent harmonica blasts that became a fundamental of blues harmonica.

He also helped to popularize the cross-harp technique, which became an important blues harmonica technique.

Before being recruited as an actor, he spent many years as a musician, as a bass player, guitarist, and blues harmonica player.

They are used by electric guitarists, pedal steel guitar players, and blues harmonica (harp) players.