D#7(b13) Guitar Chord Diagrams | D# Dominant Seventh Flat Thirteen Added
The D#7(b13) chord, also read as D# seventh flat thirteen, is spelled D#, F##, A#, C# and B: a root, a major third, a perfect fifth, a minor seventh and a flat thirteenth.
Two notes carry the dominant pull, the major third F## and the minor seventh C#, which sit a tritone apart. The chord is also spelled Eb7(b13), and the two names mean exactly the same sound. Try the D# Mixolydian b6 scale next. It is the fifth mode of the melodic minor scale and it contains all five chord tones, so it fits the chord from start to finish.
Leave out the flat thirteenth B and what remains is the dominant seventh D#7 (D#, F##, A#, C#).
D# 7th with flat 13th guitar chord is also written as D#7(b13), D#7b13 or D#7-13.
Notes of the D# 7(b13) chord:
How to create the Dominant Seventh Flat Thirteen Added chord:
Formula: 1 3 5 #5 b7
D# 7(B13) Chord Interactive Fretboard
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
Which notes form the D# seventh flat thirteen chord?
D#, F##, A#, C# and B. The F## is the major third and sounds like G. The B is the flat thirteenth, a half step higher than the fifth A#.
Is D#7(b13) the same as Eb7(b13)?
Yes, they are enharmonic twins. Eb7(b13) is spelled Eb, G, Bb, Db and Cb, which needs no double sharp, while D#7(b13) uses D#, F##, A#, C# and B.
Why does D#7(b13) use F##?
The third must carry the letter F. A major third from D# is F##, which sounds like G. Spelling it G would break the stacked-thirds letter pattern.
What scale can I use over D#7(b13)?
The D# Mixolydian b6 scale: D#, E#, F##, G#, A#, B and C#. It contains all five chord tones and is the fifth mode of the melodic minor scale.
Why is the flat thirteenth in D#7(b13) a plain B?
The thirteenth degree higher than D# is B#. Lowering it by a half step for the b13 gives B natural, a minor sixth from the root one octave up.
