A# 9 Sus4 chord — Open D
2 voicings · Open D
Tuning:DADF#AD
Open position
1 / 2
Chord tones
A#
R
D#
+5
F
+7
G#
+10
C
+2
A# 9 Sus4 in other tunings
9 Sus4 in other keys — Open D
A# 9 Sus4 in Open D — video lessons
About A# 9 Sus4 in Open D
The A# 9 Sus4 chord contains the notes A#, D#, F, G#, C. 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.