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Chord & Fret

Cmaj9(#11) — major ninth sharp eleventh

Notes on C: C – E – G – B – D – F#Formula: 1 – 3 – 5 – 7 – 9 – #11

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.

Take a maj9 and add one unexpected note — an F# over a C chord — and the sound takes on the floating shine of a film score. That color has a name: lydian. The note is raised on purpose, because the plain eleventh would rub against the major third in a semitone clash.

The same chord on all four instruments

Cmaj9(#11), 0 1 0 0 1 2Cmaj9(#11)123EA#DGCF#
Guitar
Cmaj9(#11), 0 1 0 0 1 2Cmaj9(#11)123EA#DGCF#
Electric guitar
Cmaj9(#11), 2 3 1 4Cmaj9(#11)2314EA#CF#
Cavaquinho
Cmaj9(#11), 3 6 0 3Cmaj9(#11)3132A#F#EC
Ukulele

Where to use it: Dreamy by nature, it opens or closes film-like ballads and modern jazz pieces. It is worth trying in place of a final maj7 when you want the music to end hanging in the air.

This is just one shape of Cmaj9(#11). In Chord & Fret, you check it note by note, playing any shape as an arpeggio; compare positions with their difficulty marked; and set a capo — the diagrams redraw above it. Start free. Unlock everything with Pro. 100% offline.

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Part of the Extended family.

Other chords in this family

Cmaj9C9Cm9Cm11C13

See all chord types and qualities →