C# Dim 7 chord — Open D
3 voicings · Open D
Tuning:DADF#AD
Fret 4 position
1 / 3
Chord tones
C#
R
E
+3
G
+6
A#
+9
C# Dim 7 in other tunings
Dim 7 in other keys — Open D
C# Dim 7 in Open D — video lessons
About C# Dim 7 in Open D
The C# Dim 7 chord contains the notes C#, E, G, A#. 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.