C seventh, suspended fourth

C7sus4

Also written C7sus · Csus7

NotesC · F · G · B♭
Formula1 · 4 · 5 · ♭7
C1F4G5B♭♭7
Root position

A dominant that has not decided: the 4th stands in for the 3rd. C7sus4 can resolve to C7 first — the classic sus-and-release — or go straight to F.

How pianists voice C7sus4

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

Open sus Two hands

C1F4G5B♭♭7

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.

C7sus4 inversions

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

Root position C7sus4

C1F4G5B♭♭7

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

1st inversion C7sus4/F

F4G5C1B♭♭7

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

2nd inversion C7sus4/G

G5C1F4B♭♭7

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

3rd inversion C7sus4/B♭

C1F4G5B♭♭7

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

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