A seventh, suspended fourth

A7sus4

Also written A7sus · Asus7

NotesA · D · E · G

Formula1 · 4 · 5 · ♭7

Root position

A dominant that has not decided: the 4th stands in for the 3rd. A7sus4 can resolve to A7 first — the classic sus-and-release — or go straight to D.

How pianists voice A7sus4

The same notes, laid out the way hands actually play them.

1 · ♭7 · 4 · 5 — root and ♭7 in the left hand, 4th and 5th in the right: the sus sound with room between the hands.

The same 4 notes with a different one in the bass. Each inversion is written as a slash chord.

Root at the bottom, stacked in 3rds: 1 · 4 · 5 · ♭7.

D (the 4) in the bass: 4 · 5 · ♭7 · 1.

E (the 5) in the bass: 5 · ♭7 · 1 · 4.

G (the ♭7) in the bass: ♭7 · 1 · 4 · 5.

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