12-Bar Quick Change · Blues

C7 · F7 · C7 · C7 · F7 · F7 · C7 · C7 · G7 · F7 · C7 · G7

I7 · IV7 · V7 in the key of C

Twelve bars and three chords, underneath more songs than anyone can count. The quick change is the early move up to the four chord, right in the second bar.

Four bars of 12-bar quick change in the key of C, written I7 · IV7 · V7 and played quarters over a backbeat groove at around 104 beats per minute. The chord shapes are below, and you can hear the whole thing play — and slow it down — without an account.

Chord diagrams for C7, F7, C7, C7, F7, F7, C7, C7, G7, F7, C7, G7 — I7 · IV7 · V7 in C

Practice this progression →

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How it should feel

Strum: Quarters
Groove: Backbeat
Tempo: 104 bpm
Key: C
Voicings: The Climb

The top voice steps upward through the progression — a melody rising inside the chords.

The shapes

Low E on the left, high e on the right. 0 is an open string, × is one you do not play.

Chord	E	A	D	G	B	e
C7	8	10	8	9	×	×
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
F7	×	×	10	10	10	11
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
G7	×	×	9	10	8	10
F7	×	×	10	10	10	11
C7	×	×	10	12	11	12
G7	×	10	12	10	12	×

More Blues

Posted Sep 7, 2026. Part of a growing library of guitar chord progressions.

Chord	E	A	D	G	B	e
C7	8	10	8	9	×	×
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
F7	×	×	10	10	10	11
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
G7	×	×	9	10	8	10
F7	×	×	10	10	10	11
C7	×	×	10	12	11	12
G7	×	10	12	10	12	×

Chord	E	A	D	G	B	e
C7	8	10	8	9	×	×
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
F7	×	×	10	10	10	11
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
G7	×	×	9	10	8	10
F7	×	×	10	10	10	11
C7	×	×	10	12	11	12
G7	×	10	12	10	12	×

Chord	E	A	D	G	B	e
C7	8	10	8	9	×	×
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
F7	×	×	10	10	10	11
F7	×	8	10	8	10	×
C7	×	×	5	5	5	6
C7	×	×	8	9	8	8
G7	×	×	9	10	8	10
F7	×	×	10	10	10	11
C7	×	×	10	12	11	12
G7	×	10	12	10	12	×