A♯sus4

A♯1D♯4E♯5

The third replaced by the fourth, which leans on the third it is standing in for.

Written the other way round it is B♭sus4 — 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

3311

moderate

Fig. 3

331x

easy

Fig. 4

3566

hard

Fig. 5

xab8

easy

What is true of it

A♯sus4 is A♯, D♯ and E♯ — 1, 4 and 5 counted from A♯.

These are also the notes of D♯sus2/A♯ and E♭sus2/A♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.

The easiest of the 4 fingerings below is 3311: 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.

Where its notes are on the neck

Fig. 6 — first 12 frets

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

With a different note underneath

first inversion

A♯sus4/D♯

x311

second inversion

A♯sus4/E♯

x566

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.

A♯ in other shapes

A♯sus2suspended second A♯7sus4dominant seventh suspended fourth A♯major A♯mminor A♯dimdiminished

Csus4 C♯sus4 D♭sus4 Dsus4 D♯sus4 E♭sus4 Esus4 Fsus4 all 374