F♯aug
F# Augmented — a raised fifth pushes this triad upward — a classic passing colour between stable chords.
The keys
F♯ – A♯ – D
What's inside F♯aug
| Note | Interval from root | Degree |
|---|---|---|
| F♯ | Root | 1 |
| A♯ | Major 3rd | 3 |
| D (spelled C♯♯) | Augmented 5th | #5 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | G♭4 – B♭4 – D5 |
| 1st inversion | B♭4 – D5 – G♭5 |
| 2nd inversion | D5 – G♭5 – B♭5 |
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) | G♭2 – G♭3 |
| Right (colour) | B♭4 – D5 |
Where F♯aug lives
As the I chord
F♯aug → B → D♭ → F♯aug
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
A♭m7 → D♭7 → F♯aug
The strongest cadence in harmony, resolving onto this chord.
Put F♯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 →