A#m7b5 or Bbm7b5 | A# or Bb Half-Diminished Minor 7 Chord

A#m7b5, A#m7-5, A#ø (A#o) or Bbm7b5, Bbm7-5, Bbø (Bbo)

Name: A# or Bb half-diminished minor 7 chord
Symbols: A#m7b5, A#m7-5, A#ø or Bbm7b5, Bbm7-5, Bbø
Steps: A#-C#-E♮-G# or Bb-Db-Fb-Ab

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