The D Augmented 7th chord is a four-note chord made up of D, F♯, A♯, and C. It is built from a root, major third, augmented fifth, and minor seventh.
Construction
D Augmented 7th = Root + Major 3rd + Minor 6th + Minor 7th = D · F♯ · A♯ · C
| Note | Interval | Degree |
|---|---|---|
| D | Root | 1 |
| F♯ | Major 3rd | 3 |
| A♯ | Minor 6th | ♯5 |
| C | Minor 7th | ♭7 |
D Augmented 7th Inversions
| Position | Notes |
|---|---|
| Root Position | D – F♯ – A♯ – C |
| 1st Inversion | F♯ – A♯ – C – D |
| 2nd Inversion | A♯ – C – D – F♯ |
| 3rd Inversion | C – D – F♯ – A♯ |
Key Signature
A Augmented 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.
Same Notes, Other Names
The notes D – F♯ – A♯ – C aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
D Augmented 7th — Frequently Asked Questions
What is the D Augmented 7th chord on piano?
The D Augmented 7th chord contains the notes D – F♯ – A♯ – C. On piano, play these notes together to sound the chord.
What notes are in the D Augmented 7th chord?
The D Augmented 7th chord (D+7) contains four notes: D (root), F# (major third), A# (augmented fifth), and C (minor seventh). It combines an augmented triad with a minor seventh for a bright, tense sound.
How does D Augmented 7th differ from D Dominant 7th?
Both contain D, F#, and C. D+7 has A# (augmented fifth) while D7 has A (perfect fifth). The raised fifth adds extra tension and upward chromatic pull.
How is D Augmented 7th used in music?
D+7 is an altered dominant resolving to G Major. The augmented fifth (A#) pulls up to B while C pulls down to B — both converge on the third of G. Common in jazz ii–V–I progressions with altered dominants.
What genres use Augmented 7th chords?
Augmented 7th chords are common in jazz, gospel, blues, and R&B. They add emotional intensity to dominant resolutions.
What songs use Augmented 7th chords?
Augmented 7th chords appear in jazz standards and gospel music. D+7 naturally resolves to G Major, one of the most common keys in music.
What is the difference between +7 and 7#5?
They are the same chord. D+7, D7#5, and Daug7 all refer to D Augmented 7th.