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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. B♭
  4. /
  5. 9

B♭ 9th (B♭9)

B♭Root
DMaj 3
FPerf 5
A♭min 7
C9

Rich and bluesy. Dominant 7 with added 9th. Common in jazz, blues, and R&B for sophisticated harmony.

Notes
B♭DFA♭C
Formula
1 · 3 · 5 · ♭7 · 9
Type
Extended chord
03

How to play it

EADGBe123412345

B♭9

B♭ 9th, Open

Bass
B♭, the root
Root
B♭
Strings
A D G B e · open
  • B♭Root
  • DM3
  • FP5
  • A♭m7
  • C9

Up the neck

6 voicings, same five notes

Why a 9th chord sounds the way it does

B♭+4 fretsD+3 fretsF+3 fretsA♭+4 fretsC

Stacked from 4 intervals.

04

Where to go next

More B♭ chords

Same root, other colours

B♭maj7B♭7B♭add9B♭6B♭sus2B♭sus4B♭maj9B♭6/9

Chords in the key of B♭

What B♭9 usually sits next to

I · B♭ii · Cmiii · DmIV · E♭V · Fvi · Gmvii° · A°

Close relatives

Relatives of B♭ major

  • GmRelative minor of B♭ major
  • B♭mParallel minor, lower the 3rd

Other 9 chords

Same quality, every root

C9C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9B9
01

Root

B♭
02

Quality

9

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

Why a 9th chord sounds the way it does

B♭+4 fretsD+3 fretsF+3 fretsA♭+4 fretsC

Stacked from 4 intervals.

03

How to play it

EADGBe123412345

B♭9

B♭ 9th, Open

Bass
B♭, the root
Root
B♭
Strings
A D G B e · open
  • B♭Root
  • DM3
  • FP5
  • A♭m7
  • C9

Up the neck

6 voicings, same five notes
04

Where to go next

More B♭ chords

Same root, other colours

B♭maj7B♭7B♭add9B♭6B♭sus2B♭sus4B♭maj9B♭6/9

Chords in the key of B♭

What B♭9 usually sits next to

I · B♭ii · Cmiii · DmIV · E♭V · Fvi · Gmvii° · A°

Close relatives

Relatives of B♭ major

  • GmRelative minor of B♭ major
  • B♭mParallel minor, lower the 3rd

Other 9 chords

Same quality, every root

C9C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9B9
B♭ 9th