Dadd9
D Added 9th — a plain triad plus the ninth — colour without the seventh, clean and contemporary.
The keys
D – F♯ – A – E
What's inside Dadd9
| Note | Interval from root | Degree |
|---|---|---|
| D | Root | 1 |
| F♯ | Major 3rd | 3 |
| A | Perfect 5th | 5 |
| E | Major 9th | 9 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | D4 – G♭4 – A4 – E5 |
| 1st inversion | G♭4 – A4 – E5 – D5 |
| 2nd inversion | A4 – E5 – D5 – G♭5 |
| 3rd inversion | E5 – D5 – G♭5 – A5 |
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) | D2 – A2 |
| Right (colour) | G♭4 – E5 |
Where Dadd9 lives
As the I chord
Dadd9 → G → A → Dadd9
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
Em7 → A7 → Dadd9
The strongest cadence in harmony, resolving onto this chord.
Put Dadd9 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 →