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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. C
  4. /
  5. Dim

C diminished (Cdim)

CRoot
E♭min 3
G♭Tritone

Tense and unstable. Used as a passing chord or to create dramatic tension. Common in jazz and classical music.

Notes
CE♭G♭
Formula
1 · ♭3 · ♭5
Type
Diminished triad
03

How to play it

EADGBe412312345

Cdim

C diminished, 1fr

Bass
C, the root
Root
C
Strings
A D B e · 1st fret
  • CRoot
  • E♭m3
  • G♭TT

Up the neck

6 voicings, same three notes

Why it sounds diminished

C+3 fretsE♭+3 fretsG♭

Stacked from 2 intervals. Compare with Cm →

04

Where to go next

Other Dim chords

Same quality, every root

CdimC♯dimDdimE♭dimEdimFdimF♯dimGdimA♭dimAdimB♭dimBdim
01

Root

C
02

Quality

Dim

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

Alterations need a 7th chord. Try C7 →

Why it sounds diminished

C+3 fretsE♭+3 fretsG♭

Stacked from 2 intervals. Compare with Cm →

03

How to play it

EADGBe412312345

Cdim

C diminished, 1fr

Bass
C, the root
Root
C
Strings
A D B e · 1st fret
  • CRoot
  • E♭m3
  • G♭TT

Up the neck

6 voicings, same three notes
04

Where to go next

Other Dim chords

Same quality, every root

CdimC♯dimDdimE♭dimEdimFdimF♯dimGdimA♭dimAdimB♭dimBdim
C diminished