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G♯ 9♯11

chord·/chords/dominant-9th-sharp-11th/g-sharp/

The G♯ 9♯11 chord contains the notes G♯, A♯, B♯, C♯♯, D♯, and F♯.

Notes: G♯, A♯, B♯, C♯♯, D♯, F♯ · Piano keys: G♯ A♯ B♯ C♯♯ D♯ F♯

Reviewed for accuracy · Last updated July 2026 · Maintained by Justin Evans

A♭ 9♯11
This is the same chord as A♭ 9♯11 — the same keys on the keyboard, spelled with flats.
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G♯
G♯ – A♯ – B♯ – C♯♯ – D♯ – F♯

Practice G♯ 9♯11

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Introduction

The G♯ 9♯11 chord is a six-note chord made up of G♯, A♯, B♯, C♯♯, D♯, and F♯.

Notes

Notes:G♯ – A♯ – B♯ – C♯♯ – D♯ – F♯

Key Signature

A chord has no key signature of its own, but the G♯ 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 the G♯ major scale:

C1C2C3C4CC6C7C8G#D#
I — G♯ Major (major)
DegreeNumeralChordQuality
1IG♯ MajorMajor
2iiA♯ MinorMinor
3iiiC MinorMinor
4IVC♯ MajorMajor
5VD♯ MajorMajor
6viF MinorMinor
7vii°G DiminishedDiminished

G♯ 9♯11 — Frequently Asked Questions

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

Related Tools

Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.

References & Further Reading

The note names, intervals, fingering, and harmony on this chord page are grounded in the following sources. Public domain treatises and scores are linked to their full text; primary data reflects piano.org's own interval-derived dataset.

  1. 1

    Riemann, Hugo(1896)

    Harmony Simplified (English translation)

    Public domain treatise
  2. 2

    George Grove (ed.)(1900)

    A Dictionary of Music and Musicians

    Public domain treatise
  3. 3

    Jadassohn, Salomon(1883)

    A Manual of Harmony

    Public domain treatise
  4. 4

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