F 7(#9)/B

The F 7(#9) chord consists of the F (Perfect unison), A (Major third), C (Perfect fifth), D# (Minor seventh) and G# (Minor tenth) notes, with B as the bass note.

Piano keyboard showing the notes for a F 7(#9)/B chord

How to play the F 7(#9)/B chord

  1. Play B as the lowest bass note in the left hand
  2. Find F (Root) on the piano keyboard
  3. Add A (Major third) — 4 semitones above F
  4. Add C (Perfect fifth) — 7 semitones above F
  5. Add D# (Minor seventh) — 10 semitones above F
  6. Add G# (Minor tenth) — 15 semitones above F
  7. Press all 6 notes simultaneously to sound the F 7(#9)/B chord