The G♭ 7♯9 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, minor seventh, and augmented ninth.
Construction
G♭ 7♯9 = Root + Major 3rd + Perfect 5th + Minor 7th + Minor 3rd = G♭ · B♭ · D♭ · F♭ · A
| Note | Interval | Degree |
|---|---|---|
| G♭ | Root | 1 |
| B♭ | Major 3rd | 3 |
| D♭ | Perfect 5th | 5 |
| F♭ | Minor 7th | ♭7 |
| A | Minor 3rd | ♭3 |
Key Signature
A chord has no key signature of its own, but the G♭ 7♯9 is the tonic (I) chord of Gb Major, whose key signature has 6 flats (B♭, E♭, A♭, D♭, G♭, C♭).
B♭E♭A♭D♭G♭C♭
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♭ 7♯9 — Frequently Asked Questions
What is the G♭ 7♯9 chord on piano?
The G♭ 7♯9 chord contains the notes G♭ – B♭ – D♭ – F♭ – A. On piano, play these notes together to sound the chord.
What notes are in the Gb 7♯9 chord?
The Gb 7♯9 chord (Gb7♯9) contains 5 notes: Gb, Bb, Db, E, A. Formula: R-M3-P5-m7-A9.
How is Gb7♯9 used in music?
Gb7♯9 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for Gb7♯9?
Gb7♯9 uses scale degrees 1-3-5-b7-#9, giving it its distinctive sound.