The C♭ Major 9♯11 chord is a six-note chord made up of C♭, D♭, E♭, F, G♭, and B♭.
Construction
C♭ Major 9♯11 = Root + Major 2nd + Major 3rd + Diminished 5th + Perfect 5th + Major 7th = C♭ · D♭ · E♭ · F · G♭ · B♭
| Note | Interval | Degree |
|---|---|---|
| C♭ | Root | 1 |
| D♭ | Major 2nd | 9 |
| E♭ | Major 3rd | 3 |
| F | Diminished 5th | ♭5 |
| G♭ | Perfect 5th | 5 |
| B♭ | Major 7th | 7 |
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:
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.