Bma7addb9 Major 7th
The Bma7addb9 chord is built from the notes B – D# – F# – A# – C.
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Also known as
Bma7b9Bmaj7addb9Bmajb9
Chord tones, one by one
BRoot
Root
The fundamental note the chord is built on — B.
D#Third
Major third
Four semitones — makes the chord major (brighter, happier).
F#Fifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
A#Seventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
CExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
🎼 Related scales
🎹 Modal analysis
This chord implies the Double harmonic major (Byzantine) scale; its characteristic note is the ♭9 / ♭2.
🎸 Genres
Flamenco · Middle-Eastern · Klezmer · Neoclassical metal