A♯m7♭5
Half-dim · A♯ – C♯ – E – G♯
- A♯R
- C♯m3
- E♭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), E (a diminished fifth) and G♯ (a minor seventh). Half-diminished chords are moody and jazzy — most often the ii chord in a minor key.