A♭m7♭5
Half-dim · A♭ – C♭ – D – G♭
- A♭R
- C♭m3
- D♭5
- G♭♭7
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the A♭m7♭5 chord
The A♭m7♭5 chord (Half-dim) is built from A♭ (the root), C♭ (a minor third), D (a diminished fifth) and G♭ (a minor seventh). Half-diminished chords are moody and jazzy — most often the ii chord in a minor key.