C# Diminished 7th
Introduction
Enharmonic equivalent: C♯ is enharmonically equivalent to D♭. See Db Diminished 7th.
Notes
C# Diminished 7th Inversions
| Position | Notes |
|---|---|
| Root Position | C#4 – E4 – G4 – A#4 |
| 1st Inversion | E4 – G4 – A#4 – C#5 |
| 2nd Inversion | G4 – A#4 – C#5 – E5 |
| 3rd Inversion | C#4 – E4 – G4 – A#3 |
Key Signature
The key of C# Diminished 7th has 7 sharps: F♯, C♯, G♯, D♯, A♯, E♯, B♯.
Theory: Intervals
The C# Diminished 7th is built by stacking intervals from the root note. The formula R-m3-d5-d7 describes the scale degrees used. The intervals P1-m3-d5-d7 show the distance between each note in the chord.
C# Diminished 7th — Frequently Asked Questions
What notes are in the C# Diminished 7th chord?
C# Diminished 7th is built from the C# root. Check the interactive keyboard above for exact notes and fingering.
How is the C# Diminished 7th chord used in music?
C# Diminished 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Diminished 7th).
What is the fingering for C# Diminished 7th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of C# Diminished 7th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.
Practice Tips
- Symmetrical — only 3 unique dim7 chords.
- Pivot chord for modulation.
- Maximum dramatic tension.
- Classical cadence chord.
- Compare with C#m7b5.
- Film scoring suspense.