G Major 9th
Introduction
Notes
G Major 9th Inversions
| Position | Notes |
|---|---|
| Root Position | G4 – B4 – D5 – F#5 – A5 |
| 1st Inversion | B4 – D5 – F#5 – G5 – A5 |
| 2nd Inversion | D5 – F#5 – G5 – A5 – B5 |
Key Signature
The key of G Major 9th has 1 sharp: F♯.
Theory: Intervals
The G Major 9th is built by stacking intervals from the root note. The formula R-M3-P5-M7-M9 describes the scale degrees used. The intervals P1-M3-P5-M7-M9 show the distance between each note in the chord.
G Major 9th — Frequently Asked Questions
What notes are in the G Major 9th chord?
The G Major 9th chord (Gmaj9) contains five notes: G (root), B (major third), D (perfect fifth), F# (major seventh), and A (major ninth). It is Gmaj7 with an added ninth.
How does Gmaj9 differ from G9?
Gmaj9 has a major seventh (F#). G9 has a minor seventh (F). Gmaj9 is dreamy and resolved; G9 is dominant and drives to C.
How is Gmaj9 used in music?
Gmaj9 is a lush tonic in G Major and the IV chord in D Major. G is one of the most common keys, making Gmaj9 popular in folk-jazz, singer-songwriter, and acoustic music.
What songs use Major 9th chords?
Major 9th chords appear in neo-soul, jazz, and lo-fi. Gmaj9 is common in acoustic and folk-jazz contexts.
How does Gmaj9 differ from Gadd9?
Gmaj9 includes the major seventh (F#). Gadd9 has no seventh. Gmaj9 is warmer and more sophisticated.
Do I need to play all five notes?
No — drop the fifth: G–B–F#–A is the practical voicing.
Practice Tips
- Play Gmaj7 then add A — hear the lush expansion.
- Drop the fifth: G–B–F#–A is standard.
- Gmaj9 is beautiful in acoustic music — try it as a rich tonic in folk-jazz settings.
- Practice Am9 → D13 → Gmaj9 for the ii–V–I in G.
- Gmaj9 as IV in D Major: Dmaj7 → Gmaj9 is a gorgeous movement.
- Rootless: B–D–F#–A (Bm7 shape) for jazz comping.