A Aug 9 chord — Open D
1 voicing · Open D
Tuning:DADF#AD
Fret 7 position
1 / 1
Chord tones
A
R
C#
+4
F
+8
G
+10
B
+2
A Aug 9 in other tunings
Aug 9 in other keys — Open D
A Aug 9 in Open D — video lessons
About A Aug 9 in Open D
The A Aug 9 chord contains the notes A, C#, F, G, B. In Open D tuning (strings: D–A–D–F#–A–D), the chord shapes differ from standard tuning because the open string pitches change. Open D tuning gives an open D major chord across all strings — ideal for slide guitar and Joni Mitchell-style playing. Diagrams above show all playable shapes in this tuning.