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C#9#11 Piano Chord

A Lydian dominant chord — a bright, open sound. Typical of modern jazz.

Piano

Recommended voicing
Left hand C#3 · B3 fingers 5–1
Right hand E#4 · G4 · D#5 fingers 1–2–5

How to play the C#9#11 chord on piano

Split the recommended voicing between the hands: play C#3 and B3 with the left hand and E#4, G4 and D#5 with the right. Suggested fingering is 5–1 on the left and 1–2–5 on the right (1 is the thumb). The perfect fifth G# can usually be omitted from an extended chord, keeping the sound clear and the voicing manageable.

Other names for the C#9#11 chord

Other names: C# 9th sharp 11

Music theory name: ninth sharp eleven chord

Common name: C# 9#11 chord

Notes and intervals in the C#9#11 chord

Note Interval
C# Root
E# Major 3rd
G# Perfect 5th
B Minor 7th
D# Major 9th
G Augmented 11th

More chords with C# as the root

The same chord type in other keys