The D♯ 7♯9♯11 chord is a six-note chord made up of D♯, F♯♯, A♯, C♯, E♯♯, and G♯♯. It is built from a root, major third, perfect fifth, minor seventh, augmented ninth, and augmented eleventh.
Construction
D♯ 7♯9♯11 = Root + Major 3rd + Perfect 5th + Minor 7th + Minor 3rd + Diminished 5th = D♯ · F♯♯ · A♯ · C♯ · E♯♯ · G♯♯
| Note | Interval | Degree |
|---|---|---|
| D♯ | Root | 1 |
| F♯♯ | Major 3rd | 3 |
| A♯ | Perfect 5th | 5 |
| C♯ | Minor 7th | ♭7 |
| E♯♯ | Minor 3rd | ♭3 |
| G♯♯ | Diminished 5th | ♭5 |
Key Signature
A chord has no key signature of its own, but the D♯ 7♯9♯11 is the tonic (I) chord of D# Major, whose key signature has 3 flats (B♭, E♭, A♭).
B♭E♭A♭
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 the D♯ major scale:
D♯ 7♯9♯11 — Frequently Asked Questions
What is the D♯ 7♯9♯11 chord on piano?
The D♯ 7♯9♯11 chord contains the notes D♯ – F♯♯ – A♯ – C♯ – E♯♯ – G♯♯. On piano, play these notes together to sound the chord.
What notes are in the D# 7♯9♯11 chord?
The D# 7♯9♯11 chord (D#7♯9♯11) contains 6 notes: D#, G, A#, C#, F#, A. Formula: R-M3-P5-m7-A9-A11.
How is D#7♯9♯11 used in music?
D#7♯9♯11 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for D#7♯9♯11?
D#7♯9♯11 uses scale degrees 1-3-5-b7-#9-#11, giving it its distinctive sound.