<P> 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 . </P>
<P> 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 . </P>
the twelve-bar blues and the aaba are examples of
the twelve-bar blues and the aaba are examples of
chord progressions
chord progressions