The D♯ m7♭5 Chord Explained
D-sharp minor seventh flat five is a Half-Diminished chord built from the notes D♯, F♯, A, and C♯. Its root is D♯, and its interval number formula is 1–♭3–♭5–♭7, which gives you the interval names root, minor third, diminished fifth, and minor seventh. You may also see it written as D♯m7♭5, D♯ø7, or D♯ half-diminished seventh. If you look at the widget above, you can match these notes on the piano and guitar diagrams, and hearing them together can make the chord’s tense, delicate color easier to recognize. If you are new to building chords, this shape is a great example of how chord intervals create a very specific sound.
D♯ m7♭5 Alternate Names
- D♯m7♭5
- D♯ø7
- D♯ half-diminished seventh
D♯ m7♭5 Chord Notes
D♯ m7♭5 Chord Formula
D♯ m7♭5 Chord Notation
How To Use D♯ m7♭5 In Music
Because of its lowered fifth and minor seventh, this chord sounds uneasy, shadowy, and suspenseful, so it is often used to lead smoothly into a more stable chord. In many songs, D♯m7♭5 works as a passing or pre-dominant harmony that adds drama before resolution. For example, in C♯ minor you might hear i–iiø7–V–i as C♯m–D♯m7♭5–G♯7–C♯m, where iiø7 increases tension before the dominant chord. In E major, it can also appear in a jazz-influenced vi–iiø7–V–I sound such as C♯m–D♯m7♭5–G♯7–Emaj. The mood can feel darker or softer depending on the chords around it, especially when it moves toward a dominant chord that strongly pulls forward.
D♯ m7♭5 Chord Inversions
Another useful idea for beginners is inversion, which means the same chord tones are reordered so a note other than the root is the lowest pitch. For D♯m7♭5, root position is D♯–F♯–A–C♯, first inversion is F♯–A–C♯–D♯, second inversion is A–C♯–D♯–F♯, and third inversion is C♯–D♯–F♯–A. These inversions do not change the chord’s name quality, but they do change its weight and flow: a bass note like F♯ can sound smoother and less final, while C♯ in the bass can create an especially unsettled pull toward the next chord. Composers and arrangers use inversions to make chord progressions easier to connect, to create stepwise bass lines, and to subtly reshape the mood without changing the chord itself.
