|2||F or Ab||1||9th fretfr.||optionalopt.|
Guitar chords in the key of A# or Bb:
Chord Bb7 (6th fret) notes: Bb, F, Ab, D, F or (Ab) and Bb.
This chord is played by placing a barre on fret six with your index finger. The note Ab on the second string is not required, but can be played on the 9th fret if needed.
Bb(A#) dominant 7th chord's alternative names: Bbdom7, (Bb septim).
1(A#/Bb), 3(D), 5(F), b7(G#/Ab).