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D#7(Dominant 7th Chord)

A major triad with a minor seventh. Creates harmonic tension that resolves to the tonic.

Notes
D# – G – A# – C#
Intervals (semitones)
0 – 4 – 7 – 10
Type
7th Chord

🎹 D#7 on Piano

Press highlighted keys simultaneously to play the D#7 chord.

R
D#(Root (R))
2
G(Major 3rd)
3
A#(Perfect 5th)
4
C#(Minor 7th (♭7))

🎸 D#7 on Guitar

The D#7 chord uses notes D#, G, A#, C#. Build a voicing by finding these notes on any strings — root on the 6th string is a common starting point for barre chord shapes.

Interval Analysis

DegreeInterval NameSemitonesNote in D#
RootRoot (R)0D#
3rdMajor 3rd4G
5thPerfect 5th7A#
7thMinor 7th (♭7)10C#

About the D# Dominant 7th Chord

The D#7 chord (D# Dominant 7th) consists of 4 notes: D#, G, A#, C#. A major triad with a minor seventh. Creates harmonic tension that resolves to the tonic.

To build any dominant 7th chord, apply intervals of 0, 4, 7, 10 semitones above the root. Starting from D#: the notes land on D#, G, A#, C#.

Playing D#7 on Piano

Press D#, G, A#, C# simultaneously. In root position, D# is lowest. First inversion places G in the bass for a lighter sound; second inversion uses A# as the bass note.

Common Chord Progressions Using D#7

  • I–IV–V: D#7 – G#7 – A#7 (blues and rock)
  • I–V–vi–IV: D#7 – A# – Cm – G# (pop staple)
  • I–vi–IV–V: D#7 – Cm – G# – A# (50s progression)

The D#7 Chord in Context

As a dominant 7th chord, D#7 is the tonic (I) in the key of D# major. It also appears as the IV chord in A# major, and as the V chord in G# major — making it one of the most important chords across all of Western music.

Other D# Chords

D#
Major
D#m
Minor
D#maj7
Major 7th
D#m7
Minor 7th
D#dim
Diminished
D#aug
Augmented

Dominant 7th Chord in All 12 Keys

C7C#7D7D#7E7F7F#7G7G#7A7A#7B7
🎹 Virtual Piano
Play D#7 on piano
🎸 Virtual Guitar
See on the fretboard
🎵 D# Scale
Notes that fit D#7
🎶 Songs
Find songs using D#7

FAQ

D#7 Chord — Frequently Asked Questions

What notes are in the D#7 chord?
The D# Dominant 7th chord contains: D#, G, A#, C#. These notes are derived by applying the dominant 7th interval formula (0–4–7–10 semitones) to the root note D#.
What is the D#7 chord used for?
A major triad with a minor seventh. Creates harmonic tension that resolves to the tonic. The D#7 chord is used across pop, rock, jazz, and classical music. As the I chord in the key of D# major, it functions as the most stable resting point in progressions.
How do you play D#7 on piano?
On piano, play D#, G, A#, C# simultaneously. In root position, D# is the lowest note. Inversions move the bass note up — first inversion has G lowest, second inversion has A# lowest.
How many notes are in a dominant 7th chord?
A dominant 7th chord has 4 notes: D#, G, A#, C# (in D#). It is a 7th chord, extending beyond the basic triad.
What is the difference between D# major and D# minor?
The D# major chord (D#–G–A#) uses a major third (4 semitones), giving it a bright, happy sound. The D# minor chord (D#–F#–A#) uses a minor third (3 semitones), giving it a darker, emotional sound.
What key does D#7 belong to?
D#7 naturally serves as the I chord in the key of D# major. It also appears as IV in the key of A# major, and as V in the key of G# major.
Can I play D#7 on ukulele?
Yes. The ukulele uses GCEA tuning with 4 strings. The D#7 chord notes (D#, G, A#, C#) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.
What chords go well with D#7?
In the key of D# major, D#7 pairs naturally with G# major (IV), A# major (V), and Cm (vi). The classic I–IV–V (D#7–G#–A#) is the foundation of blues, country, and rock.
What is a chord inversion of D#7?
An inversion places a non-root note in the bass. D#7 root position: D# in bass. First inversion: G in bass. Second inversion: A# in bass. Inversions create smoother bass line movement without changing the harmony.
How do I memorize the notes in a dominant 7th chord?
Remember the formula: 0–4–7–10 semitones from root. For D#7: start on D#, add 4 semitones, then 7 semitones, then 10 semitones. Practicing this across all 12 roots builds instant recognition of any dominant 7th chord.