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

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  1. Chords
  2. /
  3. C
  4. /
  5. m9

C minor 9th (Cm9)

CRoot
E♭min 3
GPerf 5
B♭min 7
D9

Smooth and sophisticated. Minor 7 with added 9th. Essential in jazz for mellow, rich harmonic color.

Notes
CE♭GB♭D
Formula
1 · ♭3 · 5 · ♭7 · 9
Type
Extended chord
03

How to play it

EADGBe12433fr4567

Cm9

C minor 9th, 1fr

Bass
C, the root
Root
C
Strings
A D G B e · open
  • CRoot
  • E♭m3
  • GP5
  • B♭m7
  • D9

Up the neck

6 voicings, same five notes

Why a minor 9th chord sounds the way it does

C+3 fretsE♭+4 fretsG+3 fretsB♭+4 fretsD

Stacked from 4 intervals.

04

Where to go next

More C chords

Same root, other colours

Cm7Cm6CmM7Cm11

Chords in the key of C minor

What Cm9 usually sits next to

i · Cmii° · D°III · E♭iv · Fmv · GmVI · A♭VII · B♭

Close relatives

Relatives of C minor

  • E♭Relative major of C minor
  • CParallel major, raise the 3rd

Other m9 chords

Same quality, every root

Cm9C♯m9Dm9E♭m9Em9Fm9F♯m9Gm9A♭m9Am9B♭m9Bm9
01

Root

C
02

Quality

m9

5+ notes: stack the 9th, 11th or 13th on a 7th chord.

Alterations need a 7th chord. Try C7 →

Why a minor 9th chord sounds the way it does

C+3 fretsE♭+4 fretsG+3 fretsB♭+4 fretsD

Stacked from 4 intervals.

03

How to play it

EADGBe1243345673fr

Cm9

C minor 9th, 1fr

Bass
C, the root
Root
C
Strings
A D G B e · open
  • CRoot
  • E♭m3
  • GP5
  • B♭m7
  • D9

Up the neck

6 voicings, same five notes
04

Where to go next

More C chords

Same root, other colours

Cm7Cm6CmM7Cm11

Chords in the key of C minor

What Cm9 usually sits next to

i · Cmii° · D°III · E♭iv · Fmv · GmVI · A♭VII · B♭

Close relatives

Relatives of C minor

  • E♭Relative major of C minor
  • CParallel major, raise the 3rd

Other m9 chords

Same quality, every root

Cm9C♯m9Dm9E♭m9Em9Fm9F♯m9Gm9A♭m9Am9B♭m9Bm9
C minor 9th