Fadd9
F Added 9th — a plain triad plus the ninth — colour without the seventh, clean and contemporary.
The keys
F – A – C – G
What's inside Fadd9
| Note | Interval from root | Degree |
|---|---|---|
| F | Root | 1 |
| A | Major 3rd | 3 |
| C | Perfect 5th | 5 |
| G | Major 9th | 9 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | F4 – A4 – C5 – G5 |
| 1st inversion | A4 – C5 – G5 – F5 |
| 2nd inversion | C5 – G5 – F5 – A5 |
| 3rd inversion | G5 – F5 – A5 – C6 |
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) | F2 – C3 |
| Right (colour) | A4 – G5 |
Where Fadd9 lives
As the I chord
Fadd9 → B♭ → C → Fadd9
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
Gm7 → C7 → Fadd9
The strongest cadence in harmony, resolving onto this chord.
Put Fadd9 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 →