C♯9

C♯1E♯3G♯5B♭7D♯9

A dominant seventh carrying a ninth on top.

Written the other way round it is D♭9 — the same twelve keys on a piano, a different piece of notation.

on ukulele on piano the scale

Every fingering that fits a hand

Fig. 2

x41101

hard

Fig. 3

x41401

hard · no 5

Fig. 4

x4344x

hard · no 5

Fig. 5

9b9a9b

hard · barre

Fig. 6

9898xx

hard · no 5

What is true of it

C♯9 is C♯, E♯, G♯, B and D♯ — 1, 3, 5, b7 and 9 counted from C♯.

On an instrument that cannot reach all 5, the 5 and 1 go first, in that order.

The easiest of the 5 fingerings below is x41101: 4 fingers, held at the 1st fret.

None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.

1 of the 5 need a barre.

1 string stays silent.

Where its notes are on the neck

Fig. 7 — first 12 frets

The brass dots are C♯, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

C♯9/E♯

121121

second inversion

C♯9/G♯

46360x

third inversion

C♯9/B

x21101

An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.

C♯ in other shapes

C♯add9added ninth C♯maj9major ninth C♯m9minor ninth C♯major C♯mminor C♯dimdiminished

C9 D9 D♯9 E♭9 E9 F9 F♯9 G♭9 all 374