A# sus4(b5)/F##
The A# sus4(b5) chord consists of the A# (Perfect unison), D# (Perfect fourth) and E (Diminished fifth) notes, with F## as the bass note.
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How to play the A# sus4(b5)/F## chord
- Play F## as the lowest bass note in the left hand
- Find A# (Root) on the piano keyboard
- Add D# (Perfect fourth) — 5 semitones above A#
- Add E (Diminished fifth) — 6 semitones above A#
- Press all 4 notes simultaneously to sound the A# sus4(b5)/F## chord