Bb 7(b9)

The Bb 7(b9) chord consists of the Bb (Perfect unison), D (Major third), F (Perfect fifth), Ab (Minor seventh) and Cb (Minor ninth) notes.

Piano keyboard showing the notes for a Bb 7(b9) chord

How to play the Bb 7(b9) chord

  1. Find Bb (Root) on the piano keyboard
  2. Add D (Major third) — 4 semitones above Bb
  3. Add F (Perfect fifth) — 7 semitones above Bb
  4. Add Ab (Minor seventh) — 10 semitones above Bb
  5. Add Cb (Minor ninth) — 13 semitones above Bb
  6. Press all 5 notes simultaneously to sound the Bb 7(b9) chord

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