C♭9♯11: C♭ Dominant 9th Sharp 11th Piano Chord

Construction

C♭ 9♯11 = Root + Major 3rd + Perfect 5th + Minor 7th + Major 2nd + Diminished 5th = C♭, E♭, G♭, B♭♭, D♭, F

Note	Interval	Degree
C♭	Root	1
E♭	Major 3rd	3
G♭	Perfect 5th	5
B♭♭	Minor 7th	♭7
D♭	Major 2nd	9
F	Diminished 5th	♭5

Key Signature

A chord has no key signature of its own, but the C♭ 9♯11 is the tonic (I) chord of C♭ 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 C♭ Major:

I — C♭ Major (major)

Degree	Numeral	Chord	Quality
1	I	C♭ Major	Major
2	ii	D♭ Minor	Minor
3	iii	E♭ Minor	Minor
4	IV	F♭ Major	Major
5	V	G♭ Major	Major
6	vi	A♭ Minor	Minor
7	vii°	B♭ Diminished	Diminished

C♭ 9♯11 : Frequently Asked Questions

What is the C♭ 9♯11 chord on piano?

The C♭ 9♯11 chord contains the notes C♭ – E♭ – G♭ – B♭♭ – D♭ – F. On piano, play these notes together to sound the chord.