D7 Dominant-Septakkord Akkord

The D Dominant-Septakkord chord contains: D, F#, A, C.

These notes are derived by applying the dominant 7th interval formula (0–4–7–10 semitones) to the root note D.

A major triad with a minor seventh.

Creates harmonic tension that resolves to the tonic. The D7 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.

On piano, play D, F#, A, C simultaneously.

In root position, D is the lowest note. Inversions move the bass note up — first inversion has F# lowest, second inversion has A lowest.

A dominant 7th chord has 4 notes: D, F#, A, C (in D).

It is a 7th chord, extending beyond the basic triad.

The D major chord (D–F#–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.

D7 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.

Yes.

The ukulele uses GCEA tuning with 4 strings. The D7 chord notes (D, F#, A, C) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

In the key of D major, D7 pairs naturally with G major (IV), A major (V), and Bm (vi).

The classic I–IV–V (D7–G–A) is the foundation of blues, country, and rock.

An inversion places a non-root note in the bass.

D7 root position: D in bass. First inversion: F# in bass. Second inversion: A in bass. Inversions create smoother bass line movement without changing the harmony.

Remember the formula: 0–4–7–10 semitones from root.

For D7: 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.