The G♭ mi13♭5 chord is a seven-note chord made up of G♭, B♭♭, D♭♭, F♭, A♭, C♭, and E♭. It is built from a root, minor third, diminished fifth, minor seventh, major ninth, perfect eleventh, and major thirteenth.
Construction
G♭ mi13♭5 = Root + Minor 3rd + Diminished 5th + Minor 7th + Major 2nd + Perfect 4th + Major 6th = G♭ · B♭♭ · D♭♭ · F♭ · A♭ · C♭ · E♭
| Note | Interval | Degree |
|---|---|---|
| G♭ | Root | 1 |
| B♭♭ | Minor 3rd | ♭3 |
| D♭♭ | Diminished 5th | ♭5 |
| F♭ | Minor 7th | ♭7 |
| A♭ | Major 2nd | 9 |
| C♭ | Perfect 4th | 11 |
| E♭ | Major 6th | 13 |
Key Signature
A chord has no key signature of its own, but the G♭ mi13♭5 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♭ mi13♭5 — Frequently Asked Questions
What is the G♭ mi13♭5 chord on piano?
The G♭ mi13♭5 chord contains the notes G♭ – B♭♭ – D♭♭ – F♭ – A♭ – C♭ – E♭. On piano, play these notes together to sound the chord.
What notes are in the Gb mi13♭5 chord?
The Gb mi13♭5 chord (Gbmi13♭5) contains 7 notes: Gb, A, C, E, Ab, B, Eb. Formula: R-m3-d5-m7-M9-P11-M13.
How is Gbmi13♭5 used in music?
Gbmi13♭5 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 Gbmi13♭5?
Gbmi13♭5 uses scale degrees 1-b3-b5-b7-9-11-13, giving it its distinctive sound.