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Ukulele Standard
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B flat seventh flat nine (Bb7(b9)) chord on ukulele

Notes
B♭DFA♭C♭
Formula
135♭7♭9

How to play Bb7(b9) on ukulele

  1. Shape 1 · fret 2

    no 5th (F)

    Bb7(b9) chord on ukulele, shape 1: from fret 2, notes Bb, D, Ab, Cb

  2. Shape 2 · fret 4

    no 5th (F)

    Bb7(b9) chord on ukulele, shape 2: from fret 4, notes Bb, D, Ab, Cb

  3. Shape 3 · fret 7

    no 5th (F)

    Bb7(b9) chord on ukulele, shape 3: from fret 7, notes Bb, D, Ab, Cb

  4. Shape 4 · fret 1

    no 5th (F)

    Bb7(b9) chord on ukulele, shape 4: from fret 1, notes Bb, D, Ab, Cb

The Bb7(b9) has 5 notes, and on ukulele only 4 fit at a time. The shapes on this page leave out: 5th (F). That is standard practice: the 5th goes first (it barely changes the sound) and, if a string is still missing, the root, which the bass player usually covers.

Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. x = do not play the string, o = open string. The coloured dot is the root (B flat).

Bb7(b9) inversions on ukulele

The same Bb7(b9) with another chord note in the bass (the lowest note that sounds). The notes stay the same, but the colour changes, and the bass line can move by step from one chord to the next. In a chord symbol, the bass comes after the slash.

  1. 3rd (D) in the bass1st inversion · Bb7(b9)/D

    B flat seventh flat nine, Bb7(b9)/D, 3242B♭7(♭9)/D3142B♭DA♭C♭metronotuner.com

  2. 3rd (D) in the bass1st inversion · Bb7(b9)/D

    B flat seventh flat nine, Bb7(b9)/D, 4241B♭7(♭9)/D3241C♭DA♭B♭metronotuner.com

  3. 7th (A♭) in the bass3rd inversion · Bb7(b9)/Ab

    B flat seventh flat nine, Bb7(b9)/Ab, 4865B♭7(♭9)/A♭41432C♭A♭B♭Dmetronotuner.com

About the seventh flat nine chord

A dominant chord with a flat ninth: maximum tension, with a Spanish and choro flavour. It is the typical V7 that resolves to a minor chord (E7♭9 → Am) and one of the most characteristic sounds of choro, flamenco and jazz.

Notes and intervals of Bb7(b9)

Bb7(b9) (B flat seventh flat nine) is built from 5 notes. Each one fills a degree of the chord:

  • B♭ · 1 · root
  • D · 3 · major third
  • F · 5 · perfect fifth
  • A♭ · ♭7 · minor seventh
  • C♭ · ♭9 · flat ninth

Other B flat chords

Seventh flat nine: other roots

Frequently asked questions

How do you play the Bb7(b9) chord on ukulele?

Bb7(b9) (B flat seventh flat nine) has 4 fingerings on this page, from easiest to hardest. Each diagram shows the fingers, the open strings (o) and the strings you do not play (x), and you can hear every shape.

What notes are in Bb7(b9)?

The notes of Bb7(b9) are B♭, D, F, A♭, C♭. The formula is 1 · 3 · 5 · ♭7 · ♭9: root, major third, perfect fifth, minor seventh, flat ninth.

What does Bb7(b9) mean?

Bb7(b9) is the chord symbol for B flat seventh flat nine. A dominant chord with a flat ninth: maximum tension, with a Spanish and choro flavour. It is the typical V7 that resolves to a minor chord (E7♭9 → Am) and one of the most characteristic sounds of choro, flamenco and jazz.

Can I play Bb7(b9) on other instruments?

Yes. Bb7(b9) also has a page on guitar, on cavaquinho, with the fingerings for each instrument.

Bb7(b9) on other instruments

All ukulele chords