One extra finger on open A, adding tension that wants to fall back to A.
Notes: A – E – D · Formula: 1 – 4 – 5
Load Asus4 onto an interactive fretboard, hear every note, and build it into a progression.
Play Asus4 in the Studio →A Asus4 chord contains the notes A, E, D. It is built from the suspended 4th formula 1 - 4 - 5, with A as the root.
The fourth (D) sits a half-step above the major third (C♯) that A major would normally have. Your ear expects that D to fall back to C♯ — and when it does, playing A again feels like an arrival. That built-in pull is what makes sus4 chords such effective decoration.