Use our acoustic guitar chord charts - from basic open chords to the daddy of altered ... D7 and E9 shapes shown here are all you need for a 12-bar blues improv in the key of A. A13 and E7#9 have ...

Blues chords. In blues ‘dominant’ 7 chords (A7 or D7 for example) are more common than basic major, minor and sus chords. The A7, D7 and E9 shapes shown here are all you need for a 12-bar ...