B+(maj9) Augmented
The B+(maj9) chord is built from the notes B – D# – F## – A# – C#.
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Also known as
B+maj9Bma9#5Bma9(#5)Bmaj9#5Bmaj9(#5)
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
Augmented fifth (♯5)
Eight semitones — a sharp fifth. Restless and dreamy, typical of augmented chords.
A#Seventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
C#Extension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
🎼 Related scales
Lydian augmentedmelodic minor a minor 3rd below
🎹 Modal analysis
This chord implies the Lydian augmented scale; its characteristic note is the dreamy, suspended ♯5. It is a mode of the melodic minor a minor 3rd below.
🎸 Genres
Film & TV scoring · Modal jazz · Impressionism