C♯aug
C# Augmented — a raised fifth pushes this triad upward — a classic passing colour between stable chords.
The keys
C♯ – E♯ – A
What's inside C♯aug
| Note | Interval from root | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E♯ | Major 3rd | 3 |
| A (spelled G♯♯) | Augmented 5th | #5 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | D♭4 – F4 – A4 |
| 1st inversion | F4 – A4 – D♭5 |
| 2nd inversion | A4 – D♭5 – F5 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | D♭2 – D♭3 |
| Right (colour) | F4 – A4 |
Where C♯aug lives
As the I chord
C♯aug → G♭ → A♭ → C♯aug
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
E♭m7 → A♭7 → C♯aug
The strongest cadence in harmony, resolving onto this chord.
Put C♯aug under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →