Chords » Bb Dominant 7th Flat Thirteenth

Symbols:Bb7b13
Scale Degree Formula:1-3-5-♭7-♭13
Interval Stack:M3 + m3 + m3 + m7
Notes:Bb, D, F, G#, F#
Hear this chord:▸ Guitar

Construction

Using the scale degree formula, we first start with the Bb major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-3-5-♭7-♭13, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the lowest note of the chord (Bb), then move our first interval (M3), which brings us to our second note in the chord (D). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
Bb1B♭2C2C#♭3D3D#4E♭5F5F##5G6G#♭7A7Bb8B♭9C9C#♭10D10D#11E#11F12F#♭13M3m3m3m7

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
Augmented Major 7thF#+Maj7
Dominant 6thBb7(6)
Dominant 7thBb7
Dominant 7th Flat 9thBb7b9
Dominant 7th Flat Five Flat 9thE7b5b9
Dominant 7th Flat Nine Flat ThirteenthBb7b9b13
Dominant 7th Sharp 9thBb7#9
Dominant 7th Sharp FifthBb7#5
Dominant 7th Sharp Five Flat 9thBb7#5b9
Dominant 7th Sharp Five Sharp 9thD7#5#9, Bb7#5#9
Dominant 9thBb9
Dominant 9th Flat FifthG#9b5, E9b5
Dominant 9th Flat ThirteenthBb9b13
Dominant 9th Sharp FifthF#9#5, Bb9#5
Major 7th Flat ThirteenthF#Maj7b13, BbMaj7b13
Major 9thF#M9
Major 9th Flat FifthF#Maj9b5
Minor 7th Flat ThirteenthBbm7b13
Minor 9th Flat FifthG#m9b5
Minor Major 9thD#mMaj9

Associated Scales

This chord can be found in the following scales.

ScaleRoots
Dorian b5G#
Harmonic MajorF#
Harmonic MinorD#
Ionian #5F#
Locrian bb7F
Locrian ♮6F
Lydian #9B
Lydian Augmented #2D
Lydian b3B
Mixolydian b2C#
Phrygian DominantBb
Phrygian b4Bb
Super-Locrian bb7D
Ukrainian DorianG#

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