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C♭ Major 9♯11

chord·/chords/major-9-sharp-11/c-flat/

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

Notes: C♭, D♭, E♭, F, G♭, B♭ · Piano keys: C♭ D♭ E♭ F G♭ B♭

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

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C♭
C♭ – D♭ – E♭ – F – G♭ – B♭

Practice C♭ Major 9♯11

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Introduction

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

Notes

Notes:C♭ – D♭ – E♭ – F – G♭ – B♭

Key Signature

A chord has no key signature of its own, but the C♭ Major 9♯11 is the tonic (I) chord of Cb Major, whose key signature has 7 flats (B♭, E♭, A♭, D♭, G♭, C♭, F♭).

B♭E♭A♭D♭G♭C♭F♭

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 C♭ Major

These are the triads built on each degree of the C♭ major scale:

C1C2C3C4BC5C6C7C8D#F#
I — B Major (major)
DegreeNumeralChordQuality
1IB MajorMajor
2iiD♭ MinorMinor
3iiiE♭ MinorMinor
4IVE MajorMajor
5VG♭ MajorMajor
6viA♭ MinorMinor
7vii°B♭ DiminishedDiminished

C♭ Major 9♯11 — Frequently Asked Questions

What is the C♭ Major 9♯11 chord on piano?
The C♭ Major 9♯11 chord contains the notes C♭ – D♭ – E♭ – F – G♭ – B♭. 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

    Jadassohn, Salomon(1883)

    A Manual of Harmony

    Public domain treatise
  2. 2

    Prout, Ebenezer(1889)

    Harmony: Its Theory and Practice

    Public domain treatise
  3. 3

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  4. 4

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