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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♯
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  5. m9

C♯ minor 9th (C♯m9)

C♯Root
Emin 3
G♯Perf 5
Bmin 7
D♯9

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

Notes
C♯EG♯BD♯
Formula
1 · ♭3 · 5 · ♭7 · 9
Type
Extended chord
03

How to play it

EADGBe41212345

C♯m9

C♯ minor 9th, Open

Bass
C♯, the root
Root
C♯
Strings
A D G B e · open
  • C♯Root
  • Em3
  • G♯P5
  • Bm7
  • D♯9

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

C♯m7C♯m6C♯mM7C♯m11

Chords in the key of C♯ minor

What C♯m9 usually sits next to

i · C♯mii° · D♯°III · Eiv · F♯mv · G♯mVI · AVII · B

Close relatives

Relatives of C♯ minor

  • ERelative major of C♯ minor
  • C♯Parallel 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 C♯7 →

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

EADGBe41212345

C♯m9

C♯ minor 9th, Open

Bass
C♯, the root
Root
C♯
Strings
A D G B e · open
  • C♯Root
  • Em3
  • G♯P5
  • Bm7
  • D♯9

Up the neck

6 voicings, same five notes
04

Where to go next

More C♯ chords

Same root, other colours

C♯m7C♯m6C♯mM7C♯m11

Chords in the key of C♯ minor

What C♯m9 usually sits next to

i · C♯mii° · D♯°III · Eiv · F♯mv · G♯mVI · AVII · B

Close relatives

Relatives of C♯ minor

  • ERelative major of C♯ minor
  • C♯Parallel major, raise the 3rd

Other m9 chords

Same quality, every root

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