A# 9sus4 Chord
How the A# 9sus4 chord is built: its notes, its interval structure, and where it fits.
The A# 9sus4 chord contains 5 notes: A# – C – D# – F – G#. It belongs to the suspended family of chord qualities. Like every chord, it is defined by the distances (intervals) between its notes, not by any one instrument — which is why the same formula names the chord whether it is voiced on a fretboard, a keyboard, or a choir.