C♯dim7
Dim 7 · C♯ – E – G – A♯
- C♯R
- Em3
- G♭5
- A♯6
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the C♯dim7 chord
The C♯dim7 chord (Dim 7) is built from C♯ (the root), E (a minor third), G (a diminished fifth) and A♯ (a major sixth). Diminished seventh chords are symmetrical and restless, handy for dramatic passing motion.