The D 9♯5 chord is a five-note chord made up of D, F♯, A♯, C, and E. It is built from a root, major third, augmented fifth, minor seventh, and major ninth.
Construction
D 9♯5 = Root + Major 3rd + Minor 6th + Minor 7th + Major 2nd = D · F♯ · A♯ · C · E
| Note | Interval | Degree |
|---|---|---|
| D | Root | 1 |
| F♯ | Major 3rd | 3 |
| A♯ | Minor 6th | ♯5 |
| C | Minor 7th | ♭7 |
| E | Major 2nd | 9 |
Key Signature
A chord has no key signature of its own, but the D 9♯5 is the tonic (I) chord of D Major, whose key signature has 2 sharps (F♯, C♯).
F♯C♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of D Major
These are the triads built on each degree of the D major scale:
Same Notes, Other Names
The notes D – F♯ – A♯ – C – E aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
D 9♯5 — Frequently Asked Questions
What is the D 9♯5 chord on piano?
The D 9♯5 chord contains the notes D – F♯ – A♯ – C – E. On piano, play these notes together to sound the chord.
What notes are in the D 9♯5 chord?
The D 9♯5 chord (D9♯5) contains 5 notes: D, F#, A#, C, E. Formula: R-M3-A5-m7-M9.
How is D9♯5 used in music?
D9♯5 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 D9♯5?
D9♯5 uses scale degrees 1-3-#5-b7-9, giving it its distinctive sound.