Understanding 12 Bar Blues Progression

Notes in the Backing Chords. (Guitar chords may contain different voicings-this diagram shows idealised chords)

 

Root

Major 3rd

5th

Dominant 7th

A7

A

C#

E

G

D7

D

F#

A

C

E7

E

G#

B

D

 

12 Bar Blues Structure

A7

A7

A7

A7

D7

D7

A7

A7

E7

D7

A7

E7