Twelve-bar blues

Typical boogie woogie bassline on twelve-bar blues progression in C, chord roots in red

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]

  1. ^ Thomas 2002, p. 85.

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