G♯maj9♯11: G♯/A♭ 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 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 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.

What is the G# piano chord?

The G# piano chord (written G♯ Major 9♯11) uses the same keys: G♯ – B♯ – D♯ – F♯♯ – A♯ – C♯♯. The # and ♯ symbols name the same black key.