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 minor ninth.
Construction
G 7♭9 = Root + Major 3rd + Perfect 5th + Minor 7th + Minor 2nd = 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 2nd | ♭9 |
Key Signature
A chord has no key signature of its own, but the G 7♭9 is the tonic (I) chord of G Major, whose key signature has 1 sharp (F♯).
F♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
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 G 7♭9 chord?
The G 7♭9 chord (G7♭9) contains 5 notes: G, B, D, F, Ab. Formula: R-M3-P5-m7-m9.
How is G7♭9 used in music?
G7♭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 G7♭9?
G7♭9 uses scale degrees 1-3-5-b7-b9, giving it its distinctive sound.