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An interactive reference for guitar chord shapes, voicings and the theory behind them.

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  1. Chords
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  3. A
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  5. Sus4

A suspended 4th (Asus4)

ARoot
DPerf 4
EPerf 5

Anticipatory and unresolved. Replaces the 3rd with a 4th. Common in rock and pop as a transition chord.

Notes
ADE
Formula
1 · 4 · 5
Type
Suspended 4th triad
03

How to play it

EADGBe12312345

Asus4

A suspended 4th, Open

Bass
A, the root
Root
A
Strings
A D G B e · open
  • ARoot
  • DP4
  • EP5

Up the neck

6 voicings, same three notes

Why it sounds suspended 4th

A+5 fretsD+2 fretsE

Stacked from 2 intervals. Compare with Asus2 →

04

Where to go next

More A chords

Same root, other colours

Amaj7A7Aadd9A6Asus2Amaj9A6/9

Chords in the key of A

What Asus4 usually sits next to

I · Aii · Bmiii · C♯mIV · DV · Evi · F♯mvii° · G♯°

Close relatives

Relatives of A major

  • F♯mRelative minor of A major
  • AmParallel minor, lower the 3rd

Other Sus4 chords

Same quality, every root

Csus4C♯sus4Dsus4E♭sus4Esus4Fsus4F♯sus4Gsus4A♭sus4Asus4B♭sus4Bsus4
01

Root

A
02

Quality

Sus4

3 notes: root, 3rd, 5th. Every other chord is built on one of these.

Alterations need a 7th chord. Try A7 →

Why it sounds suspended 4th

A+5 fretsD+2 fretsE

Stacked from 2 intervals. Compare with Asus2 →

03

How to play it

EADGBe12312345

Asus4

A suspended 4th, Open

Bass
A, the root
Root
A
Strings
A D G B e · open
  • ARoot
  • DP4
  • EP5

Up the neck

6 voicings, same three notes
04

Where to go next

More A chords

Same root, other colours

Amaj7A7Aadd9A6Asus2Amaj9A6/9

Chords in the key of A

What Asus4 usually sits next to

I · Aii · Bmiii · C♯mIV · DV · Evi · F♯mvii° · G♯°

Close relatives

Relatives of A major

  • F♯mRelative minor of A major
  • AmParallel minor, lower the 3rd

Other Sus4 chords

Same quality, every root

Csus4C♯sus4Dsus4E♭sus4Esus4Fsus4F♯sus4Gsus4A♭sus4Asus4B♭sus4Bsus4
A suspended 4th