Maj7 and Min7 open chords
I. Major 7
II. Minor 7
2 minor blues progressions that use min7 chords:
blues in Am
| Am7 | % | % | % |
| Dm7 | % | Am7 | % |
| Em7* | Dm7 | Am7 | Em7* |
(* can use E7 instead if desired)
blues in Em
| Em7 | % | % | % |
| Am7 | % | Em7 | % |
| Bm7* | Am7 | Em7 | Bm7* |
(* can use B7 instead if desired)