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Chord & Fret

C9 — dominant ninth

Notes on C: C – E – G – Bb – DFormula: 1 – 3 – 5 – b7 – 9

In the formula, the numbers count steps of the major scale starting from the note that names the chord; "b" lowers a half step, "#" raises one — and a slash names the bass note.

The 9 is the dominant chord with the ninth. It keeps the dominant function and adds color and breadth.

The same chord on all four instruments

C9, 0 1 0 0 1 0C912EBbDGCE
Guitar
C9, 0 1 0 0 1 0C912EBbDGCE
Electric guitar
C9, 2 3 1 0C9231EBbCD
Cavaquinho
C9, 3 0 0 5C912BbCED
Ukulele

Where to use it: Blues, funk, choro and broader dominants.

This is just one shape of C9. In Chord & Fret, you check it note by note, playing any shape as an arpeggio; open every variation on the neck, grouped by bass note; and change the tuning — the shape rewrites itself. Start free. Unlock everything with Pro. 100% offline.

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Part of the Extended family.

Other chords in this family

Cmaj9Cm9Cm11C13Cmaj9(#11)

See all chord types and qualities →