A# 9 b5 chord — Open G
1 voicing · Open G
Tuning:DGDGBD
Open position
1 / 1
Chord tones
A#
R
D
+4
E
+6
G#
+10
C
+2
A# 9 b5 in other tunings
9 b5 in other keys — Open G
A# 9 b5 in Open G — video lessons
About A# 9 b5 in Open G
The A# 9 b5 chord contains the notes A#, D, E, 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.