semicord

Asus2 A suspended second chord

Notes
A B E
Formula
1 2 5
Semitones
0 2 7 above the root

A to B is a major second (2 semitones), B to E is a perfect fourth (5 semitones). The third is replaced by the second (B), so the chord is neither major nor minor. The same three keys with E in the bass read as Esus4.

Asus2 on the piano

C4D4E4F4G4A4B4C5D5E5F5G5A5B5C#4Eb4F#4Ab4Bb4C#5Eb5F#5Ab5Bb5C4ABC5E

Root position from A4: A4, B4, E5. Middle C is C4.

Asus2 on the guitar

Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has A as its lowest note.

×AEEAABE
Open position (A-shape)
x 0 2 2 0 0 (low E to high e)
Sounds A2 E3 A3 B3 E4

The barre shapes are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play suspended second chords on other roots.

Inversions of Asus2

An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.

PositionNotes, bass firstNamedListen
Root positionA B EAsus2
1st inversionB E AB7sus4 (also read as Asus2/B)
2nd inversionE A BEsus4 (also read as Asus2/E)

Where Asus2 fits

A sus chord has no third, so it is neither major nor minor and has no fixed place in a key. In Asus2 the second, B, usually rises to the major or minor third or falls back to the root A; it is also often left unresolved as a colour, especially on guitar.