G♭maj9♯11: F♯/G♭ Major 9th Sharp 11th Piano Chord

Construction

G♭ Major 9♯11 = Root + Major 3rd + Perfect 5th + Major 7th + Major 2nd + Diminished 5th = G♭, B♭, D♭, F, A♭, C

Note	Interval	Degree
G♭	Root	1
B♭	Major 3rd	3
D♭	Perfect 5th	5
F	Major 7th	7
A♭	Major 2nd	9
C	Diminished 5th	♭5

Key Signature

A chord has no key signature of its own, but the G♭ Major 9♯11 is the tonic (I) chord of G♭ 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 G♭ Major:

I — G♭ Major (major)

Degree	Numeral	Chord	Quality
1	I	G♭ Major	Major
2	ii	A♭ Minor	Minor
3	iii	B♭ Minor	Minor
4	IV	C♭ Major	Major
5	V	D♭ Major	Major
6	vi	E♭ Minor	Minor
7	vii°	F Diminished	Diminished

G♭ Major 9♯11 : Frequently Asked Questions

What is the G♭ Major 9♯11 chord on piano?

The G♭ Major 9♯11 chord contains the notes G♭ – B♭ – D♭ – F – A♭ – C. On piano, play these notes together to sound the chord.