Bb7(b13) Guitar Chord Chart | Bb Dominant Seventh Flat Thirteen Added

Built on Bb, the Bb7(b13) chord (Bb seventh flat thirteen) combines a root, a major third, a perfect fifth, a minor seventh and a flat thirteenth, which gives Bb, D, F, Ab and Gb. The flat thirteenth Gb is the same pitch as the sharp fifth, F#, though this chord keeps the natural fifth F as well.

Its core is the dominant seventh Bb, D, F, Ab, and the flat thirteenth Gb is the colour on top. Every tone of Bb7(b13) sits inside the Bb Mixolydian b6 scale, the fifth mode of the melodic minor scale, so it is a natural pool of notes for lines over the chord.

A chart may also write it as 7b13 or 7-13, and all of these spellings mean the same chord.

Bb 7th with flat 13th guitar chord is also written as Bb7(b13), Bb7b13 or Bb7-13.

Notes of the Bb 7(b13) chord:

Bb D F Ab Gb

Chord Structure:

Formula: 1 3 5 #5 b7

Bb 7(B13) Chord Interactive Fretboard

Want a structured chord roadmap instead of jumping between pages?
Go to the full guitar chords tutorial.

download this tutorial in pdf Download the Free Guitar Chords Chart Pdf

Play This Chord With Other Roots

C 7(b13) | D 7(b13) | E 7(b13) | F 7(b13) | G 7(b13) | A 7(b13) | B 7(b13) | C#7(b13) | D#7(b13) | F#7(b13) | G#7(b13) | A#7(b13) | Ab7(b13) | Bb7(b13) | Db7(b13) | Eb7(b13) | Gb7(b13)

Want to Learn Everything About Chords?

Check Chords Domination out: a unique ebook that shows you finger positions, note names and intervals in the chords (plus a tones fretboard maps)

You'll learn how to play 44 chords types across all the fretboard, with many voicings and fingerings

In the ebook you can also find maps show you the tones in a chord all along the fretboard. They are incredibly helpful because allow you to:

Create new voicings on the fly, across all the neck
Improvise targeting the right notes
Unlock the fretboard and expand the CAGED system.

In the new ebook, Chords Domination, you'll find the fretboard tones maps for 44 different qualities of chords. Check it out:

Download Free Excerpt Learn More Here

Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

Which notes are in Bb7(b13)?

Bb, D, F, Ab and Gb. The first four form a Bb seventh chord, and the Gb is the flat thirteenth.

What does the Gb add to the Bb seventh flat thirteen chord?

The Gb is the flat thirteenth, a minor sixth from the root one octave up. It lies a half step higher than the fifth, F, so the two notes sit very close together.

Is A#7(b13) the same chord as Bb7(b13)?

Yes, they sound identical. A#7(b13) is spelled A#, C##, E#, G# and F#, which needs double sharps, so Bb7(b13) is the easier spelling.

What scale can I use over Bb7(b13)?

The Bb Mixolydian b6 scale: Bb, C, D, Eb, F, Gb and Ab. It contains all five chord tones and is the fifth mode of the melodic minor scale.

Why is Bb7(b13) spelled with Gb and not F#?

The thirteenth higher than Bb takes the letter G, so the lowered thirteenth is Gb. F# sounds the same but would name a different degree, an augmented fifth.