Skip to content
piano.org
A piano reference: chords, scales, theory & ear training.
/
Spotted something? Leave a note ↓

G♭ 9♯11

chord·/chords/9-sharp-11/g-flat/

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

F♯ 9♯11
This is the same chord as F♯ 9♯11 — the same keys on the keyboard, spelled with sharps.
Jump to any CHORD
Piano Deck · Chord
Three quick cards on G♭ 9♯11
Answer on the keyboard, not with buttons. No login required.
G♭
G♭ – A♭ – B♭ – C – D♭ – F♭

Practice G♭ 9♯11

Reading about it is one thing. Drilling it is what makes it automatic.

Chord Drill →Timed drills — build speed and recognitionPractice Room →Plug in a MIDI keyboard for real-time feedback

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 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:

C1C2C3C4C5C6C7C8F#A#C#
I — G♭ Major (major)
DegreeNumeralChordQuality
1IG♭ MajorMajor
2iiA♭ MinorMinor
3iiiB♭ MinorMinor
4IVB MajorMajor
5VD♭ MajorMajor
6viE♭ MinorMinor
7vii°F 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

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  2. 2

    Riemann, Hugo(1896)

    Harmony Simplified (English translation)

    Public domain treatise
  3. 3

    Schubert, Franz(1827)

    Impromptu in G♭ major, Op. 90 No. 3 (D. 899)

    Public domain score
  4. 4

Spot something that looks off? Use the note form below — corrections are reviewed by hand.

Leave a note

Spotted a typo, have a question, or want to add something? We read every note.

0 / 1000