C9#5 Piano Chord: Notes, Inversions and Fingering (C Augmented Ninth)

How to play C9#5

Find C at or above middle C. That is the root.
Add E, G#, Bb and D above it, skipping the keys in between.
Right hand fingering: 1-2-3-4-5, or split the chord between both hands. Left hand: play the root and fifth, and leave the upper notes to the right hand.

Notes

Croot

E3 · major third

G##5 · augmented fifth

Bbb7 · minor seventh

D9 · ninth

Notes and theory

Croot

E3 · major third

G##5 · augmented fifth

Bbb7 · minor seventh

D9 · ninth

The augmented ninth (9#5) is a dominant ninth with a raised fifth, used as a strong pull toward the next chord. The formula is 1 3 #5 b7 9, and you will also see it written as Caug9 and C+9.

C9#5 on guitar C9#5 on ukulele

More C chords

All C piano chords

Cmajor Cmminor C7dominant seventh Cm7minor seventh Cmaj7major seventh Csus4suspended fourth Csus2suspended second Cdimdiminished Caugaugmented C6major sixth C9dominant ninth Cadd9added ninth Cm7b5half-diminished Cdim7diminished seventh C7sus4dominant seventh suspended fourth C5power chord Cm6minor sixth Cm9minor ninth

augmented ninth chords in every key

C9#5 C#9#5 D9#5 D#9#5 E9#5 F9#5 F#9#5 G9#5 G#9#5 A9#5 A#9#5 B9#5

Questions

What notes are in the C9#5 chord?

C9#5 (C augmented ninth) is made of five notes: C (root), E (major third), G# (augmented fifth), Bb (minor seventh) and D (ninth).

How do you play C9#5 on piano?

Play C, E, G#, Bb and D together. With the right hand use fingers 1-2-3-4-5, or split the chord between both hands; with the left hand use play the root and fifth, and leave the upper notes to the right hand.

What does a augmented ninth chord sound like?

The augmented ninth (9#5) is a dominant ninth with a raised fifth, used as a strong pull toward the next chord.