Amaj9
A Major 9th — the maj7 opened up with a ninth — wide, modern, and glassy; a staple of contemporary keys playing.
The keys
A – C♯ – E – G♯ – B
What's inside Amaj9
| Note | Interval from root | Degree |
|---|---|---|
| A | Root | 1 |
| C♯ | Major 3rd | 3 |
| E | Perfect 5th | 5 |
| G♯ | Major 7th | 7 |
| B | Major 9th | 9 |
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) | A2 – A♭3 |
| Right (colour) | D♭5 – B5 |
Where Amaj9 lives
As the i chord
Amaj9 → F → G → Amaj9
The minor home base: i–VI–VII pulls away and lands back home.
In a ii–V–i
Bm7♭5 → E7 → Amaj9
The minor two-five resolving into this chord as the destination.
Put Amaj9 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 →