C Aug 9 chord — Open G
2 voicings · Open G
Tuning:DGDGBD
Open position
1 / 2
Chord tones
C
R
E
+4
G#
+8
A#
+10
D
+2
C Aug 9 in other tunings
Aug 9 in other keys — Open G
C Aug 9 in Open G — video lessons
About C Aug 9 in Open G
The C Aug 9 chord contains the notes C, E, G#, A#, D. 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.