Construction
D♯ Diminished Major 7th = Root + Minor 3rd + Diminished 5th + Major 7th = D♯, F♯, A, C♯♯
| Note | Interval | Degree |
|---|---|---|
| D♯ | Root | 1 |
| F♯ | Minor 3rd | ♭3 |
| A | Diminished 5th | ♭5 |
| C♯♯ | Major 7th | 7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| D♯ | black | index finger (2) | little finger (5) |
| F♯ | black | middle finger (3) | ring finger (4) |
| A | white | ring finger (4) | middle finger (3) |
| C♯♯ | white | little finger (5) | index finger (2) |
Right hand: index finger (2) on D♯, middle finger (3) on F♯, ring finger (4) on A, little finger (5) on C♯♯.
Left hand: little finger (5) on D♯, ring finger (4) on F♯, middle finger (3) on A, index finger (2) on C♯♯.
Key Signature
A Diminished Major 7th chord is built from symmetrical or ambiguous intervals, so it doesn't belong to a single key and has no key signature of its own.
Chords in the Key of D♯ Major
These are the triads built on each degree of D♯ Major:
D♯ Diminished Major 7th : Frequently Asked Questions
What is the D♯ Diminished Major 7th chord on piano?
The D♯ Diminished Major 7th chord contains the notes D♯ – F♯ – A – C♯♯. On piano, play these notes together to sound the chord.
What is the D# piano chord?
The D# piano chord (written D♯ Diminished Major 7th) uses the same keys: D♯ – F♯ – A – C♯♯. The # and ♯ symbols name the same black key.