The D♯ Major 7♭5 chord is a four-note chord made up of D♯, F♯♯, A, and C♯♯.
Construction
D♯ Major 7♭5 = Root + Major 3rd + Diminished 5th + Major 7th = D♯ · F♯♯ · A · C♯♯
| Note | Interval | Degree |
|---|---|---|
| D♯ | Root | 1 |
| F♯♯ | Major 3rd | 3 |
| A | Diminished 5th | ♭5 |
| C♯♯ | Major 7th | 7 |
Key Signature
A chord has no key signature of its own, but the D♯ Major 7♭5 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♯ Major 7♭5 — Frequently Asked Questions
What is the D♯ Major 7♭5 chord on piano?
The D♯ Major 7♭5 chord contains the notes D♯ – F♯♯ – A – C♯♯. On piano, play these notes together to sound the chord.