The Bigsby vibrato tailpiece is a type of vibrato device for electric guitar designed by Paul A. Bigsby. The device allows musicians to bend the pitch of notes or entire chords with their pick hand for various effects. The Bigsby was the first successful design of what is now called a whammy bar or tremolo arm, although vibrato is the technically correct term for the musical effect it produces. In standard usage, tremolo is a rapid fluctuation of the volume of a note, while vibrato is a fluctuation in pitch. The origin of this nonstandard usage of the term by electric guitarists is attributed to Leo Fender, who also used the term "vibrato" to refer to what is really a tremolo effect.

Bigsby vibratos are still factory installed on a variety of electric guitars, including certain instruments branded as Epiphone, Fender, Gibson, Gretsch, Guild, Hamer as well as luthiers companies such as Motor Ave. Many electric guitars can also be retrofitted with a Bigsby (requires no routing of the body), and there are different varieties of the unit designed to fit different styles of guitar, such as a hollow body or solid body guitar. Bigsby units ship with their own rocker bridges, though these are often discarded in favor of more adjustable alternatives such as the Tune-o-matic style bridge or Jazzmaster style bridge. The rocker bridges that come with the Bigsby do not offer individual string intonation adjustment, and have relative string length preset for string sets with a wound G string, rather than for the plain G string preferred by many electric guitarists today.

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