The G♯ Major 9th chord is a five-note chord made up of G♯, B♯, D♯, F♯♯, and A♯. It is built from a root, major third, perfect fifth, major seventh, and major ninth.
Construction
G♯ Major 9th = Root + Major 3rd + Perfect 5th + Major 7th + Major 2nd = G♯ · B♯ · D♯ · F♯♯ · A♯
| Note | Interval | Degree |
|---|---|---|
| G♯ | Root | 1 |
| B♯ | Major 3rd | 3 |
| D♯ | Perfect 5th | 5 |
| F♯♯ | Major 7th | 7 |
| A♯ | Major 2nd | 9 |
Key Signature
A chord has no key signature of its own, but the G♯ Major 9th is the tonic (I) chord of G# Major, whose key signature has 4 flats (B♭, E♭, A♭, D♭).
B♭E♭A♭D♭
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
B♭E♭A♭D♭G♭C♭F♭
Mnemonic: Battle Ends And Down Goes Charles’ Father
Chords in the Key of G♯ Major
These are the triads built on each degree of the G♯ major scale:
G♯ Major 9th — Frequently Asked Questions
What is the G♯ Major 9th chord on piano?
The G♯ Major 9th chord contains the notes G♯ – B♯ – D♯ – F♯♯ – A♯. On piano, play these notes together to sound the chord.
What notes are in the G# Major 9th chord?
G# Major 9th is built from the G# root. Check the interactive keyboard above for exact notes and fingering.
How is the G# Major 9th chord used in music?
G# Major 9th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Major 9th).
What is the fingering for G# Major 9th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of G# Major 9th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.