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E A D G B E
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Progression

The 12-bar blues (quick change) in Ab major

12-bar blues (quick change) in Ab major plays Ab7, Db7 and Eb7 — I, IV and V — across 12 chords. The same twelve-bar blues form, ending back on the I chord for the last two bars instead of turning around on V — common when a band is vamping into a repeat.

The chords, in order

Bar 1Ab7I
Bar 2Db7IV
Bar 3Ab7I
Bar 4Ab7I
Bar 5Db7IV
Bar 6Db7IV
Bar 7Ab7I
Bar 8Ab7I
Bar 9Eb7V
Bar 10Db7IV
Bar 11Ab7I
Bar 12Ab7I

The shapes

IAb7
Ab dominant seventh, position 4, capo 0. Strings from lowest to highest: fret 4, fret 6, fret 4, fret 5, fret 4, fret 4. Frets are relative to the capo. Barre at relative fret 4, strings 1 to 6.4fr
464544IVDb7
Db dominant seventh, open position, capo 0. Strings from lowest to highest: muted, fret 4, fret 3, fret 4, open, fret 4. Frets are relative to the capo.
x43404VEb7
Eb dominant seventh, open position, capo 0. Strings from lowest to highest: muted, muted, fret 1, fret 3, fret 2, fret 3. Frets are relative to the capo.
xx1323

The same progression in a nearby key

Open 12-bar blues (quick change) in Ab major in the explorer →All seven chords in Ab major →