A 7 #9 b5 chord — Open G
1 voicing · Open G
Tuning:DGDGBD
Fret 10 position
1 / 1
Chord tones
A
R
C#
+4
D#
+6
G
+10
C
+3
A 7 #9 b5 in other tunings
7 #9 b5 in other keys — Open G
A 7 #9 b5 in Open G — video lessons
About A 7 #9 b5 in Open G
The A 7 #9 b5 chord contains the notes A, C#, D#, G, C. In Open G tuning (strings: D–G–D–G–B–D), the chord shapes differ from standard tuning because the open string pitches change. Open G tuning lets you play a G major chord across all open strings — widely used in blues and slide guitar. Diagrams above show all playable shapes in this tuning.