A#7sus4

— About this chord

A#7sus4 has a tense, suspended glow—open, unresolved, and slightly gritty—delivering a bold, anticipatory mood before release. Heard in jazz, blues turnarounds, funk vamps, and rock pop hooks, it drives groove-heavy progressions. Its percussive, modal edge can hint at Afro-Cuban or Latin flavors when rhythmically accented. Technically it’s a dominant sus chord (A#–D#–E#–G#), often played as a barre or movable shape; beginner-to-intermediate friendly. Commonly used for dominant function suspense, it delays the third, creating push-pull tension that resolves to A#7 or D#/E# harmony; also searched as Bb7sus4.