The A♭ m7♭5 Chord Explained
A-flat minor seventh flat five is a Half-Diminished chord built from the notes A♭, C♭, E♭♭, and G♭. Its root is A♭, 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 A♭m7♭5, A♭ø7, or A-flat half-diminished seventh. If you look at the widget above, you can use the piano and guitar diagrams to spot each chord tone and hear how these notes combine; this is also a great way to start understanding chord intervals as a beginner.
A♭ m7♭5 Alternate Names
- A♭m7♭5
- A♭ø7
- A-flat half-diminished seventh
A♭ m7♭5 Chord Notes
A♭ m7♭5 Chord Formula
A♭ m7♭5 Chord Notation
How To Use A♭ m7♭5 In Music
Because this chord contains both a minor color and a tense diminished fifth, it sounds dark, delicate, and unsettled. It often creates a feeling of suspense that wants to move somewhere more stable, which is why it appears so often in jazz, classical, and minor-key harmony. For example, in a minor key it can work as iiø7 in a progression such as iiø7–V7–i, and A♭m7♭5 could lead smoothly to D♭7 and then G♭ minor in that kind of pattern. It may also appear in passing progressions or richer harmonic motion, where the mood changes depending on the chords around it: next to softer minor chords it can sound expressive, but before a strong dominant it sounds more urgent. To better understand that pull toward the next harmony, compare its color with a dominant chord in progressions like i–iiø7–V7–i or iv–iiø7–V7–i.
A♭ m7♭5 Chord Inversions
Another useful idea is inversion, which means the chord keeps the same notes but starts from a note other than the root. In root position, A♭ is the lowest note: A♭–C♭–E♭♭–G♭. In first inversion, C♭ is in the bass: C♭–E♭♭–G♭–A♭. In second inversion, E♭♭ is in the bass: E♭♭–G♭–A♭–C♭. In third inversion, G♭ is in the bass: G♭–A♭–C♭–E♭♭. These inversions do not change the chord’s identity, but they do change its weight and flow. A root-position shape often sounds the most direct, while inversions can sound smoother, lighter, or more connected to the chord before or after it. Musicians use inversions to create better bass lines, gentler voice leading, and less jumpy chord movement.
