Twelve-bar blues
Prominent chord progression in popular music / From Wikipedia, the free encyclopedia
For the Scott Weiland album, see 12 Bar Blues (album). For the Patrick Neate novel, see Twelve Bar Blues (novel).
The twelve-bar blues (or blues changes) is one of the most prominent chord progressions in popular music. The blues progression has a distinctive form in lyrics, phrase, chord structure, and duration. In its basic form, it is predominantly based on the I, IV, and V chords of a key. Mastery of the blues and rhythm changes are "critical elements for building a jazz repertoire".[1]