C♯aug

C♯1E♯3G𝄪♯5

Two major thirds stacked. Symmetrical: every note can be heard as the root.

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

on guitar on piano the scale

Every fingering that fits a hand

Fig. 2

x110

moderate · barre

Fig. 3

655x

easy

Fig. 4

6554

moderate

Fig. 5

6558

hard

Fig. 6

6998

hard

What is true of it

C♯aug is C♯, E♯ and G𝄪 — 1, 3 and #5 counted from C♯.

G𝄪 is a double sharp, and it has to be: every letter from C♯ upwards is used once, so the #5 cannot be written any other way.

The easiest of the 5 fingerings below is x110: one finger, one of them barring the 1st fret, 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♯aug/E♯

x554

second inversion

C♯aug/G𝄪

2110

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♯major C♯mminor C♯dimdiminished C♯5power chord C♯sus2suspended second C♯sus4suspended fourth

Caug Daug D♯aug E♭aug Eaug Faug F♯aug G♭aug all 374