D♭maj9♯11: C♯/D♭ Major 9th Sharp 11th Piano Chord

Construction

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

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

Key Signature

A chord has no key signature of its own, but the D♭ Major 9♯11 is the tonic (I) chord of D♭ Major, whose key signature has 5 flats (B♭, E♭, A♭, D♭, G♭).

B♭E♭A♭D♭G♭

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 D♭ Major

These are the triads built on each degree of D♭ Major:

I — D♭ Major (major)

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

D♭ Major 9♯11 : Frequently Asked Questions

What is the D♭ Major 9♯11 chord on piano?

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