D#dim7 7e Diminuée Accord

The D# 7e Diminuée chord contains: D#, F#, A, C.

These notes are derived by applying the diminished 7th interval formula (0–3–6–9 semitones) to the root note D#.

Four notes stacked in minor thirds.

Extremely tense, used as a passing chord. The D#dim7 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 diminished 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#–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.

D#dim7 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 D#dim7 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, D#dim7 pairs naturally with G# major (IV), A# major (V), and Cm (vi).

The classic I–IV–V (D#dim7–G#–A#) is the foundation of blues, country, and rock.

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

D#dim7 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: 0–3–6–9 semitones from root.

For D#dim7: start on D#, add 3 semitones, then 6 semitones, then 9 semitones. Practicing this across all 12 roots builds instant recognition of any diminished 7th chord.