C# Augmented 7th
Introduction
Enharmonic equivalent: C♯ is enharmonically equivalent to D♭. See Db Augmented 7th.
Notes
C# Augmented 7th Inversions
| Position | Notes |
|---|---|
| Root Position | C#4 – F4 – A4 – B4 |
| 1st Inversion | F4 – A4 – B4 – C#5 |
| 2nd Inversion | A4 – B4 – C#5 – F5 |
| 3rd Inversion | C#4 – F4 – A4 – B3 |
Key Signature
The key of C# Augmented 7th has 7 sharps: F♯, C♯, G♯, D♯, A♯, E♯, B♯.
Theory: Intervals
The C# Augmented 7th is built by stacking intervals from the root note. The formula R-M3-A5-m7 describes the scale degrees used. The intervals P1-M3-A5-m7 show the distance between each note in the chord.
C# Augmented 7th — Frequently Asked Questions
What notes are in the C# Augmented 7th chord?
C# Augmented 7th is built from the C# root. Check the interactive keyboard above for exact notes and fingering.
How is the C# Augmented 7th chord used in music?
C# Augmented 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Augmented 7th).
What is the fingering for C# Augmented 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# Augmented 7th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.
Practice Tips
- Dominant with raised fifth.
- Resolves to the tonic.
- Whole-tone scale colour.
- Jazz altered dominant.
- Compare with C#7 and C#aug.
- Creates forward motion.