Unknown chord with root Bb

Symbols:Unknown
Scale Degree Formula:1-3-5-7-♭10
Interval Stack:M3 + m3 + M3 + M3
Notes:Bb, D, F, A, C#
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-♭10, 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#♭10M3m3M3M3

Similar Chords

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

Chord TypeChords
Dominant 7th Sharp 9thBb7#9
Dominant 7th Sharp Five Flat 9thC#7#5b9, A7#5b9
Major 7thBbM7
Major 7th Flat ThirteenthF#Maj7b13, DMaj7b13, BbMaj7b13
Major 9thBbM9
Minor 7th Flat ThirteenthDm7b13
Minor 9thGm9
Minor 9th Flat FifthGm9b5, Bm9b5
Minor Major 7thDmM7, BbmM7
Minor Major 9thDmMaj9, BbmMaj9

Associated Scales

This chord can be found in the following scales.

ScaleRoots
Harmonic MinorD
Ionian #5F
Locrian ♮6E
Lydian #9Bb
Phrygian DominantA
Super-Locrian bb7C#
Ukrainian DorianG

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