B7altb9#11 Dominant 7th
The B7altb9#11 chord is built from the notes B – D# – A – C – E#.
Piano sound loads on first tap.
Also known as
B-alt7b9#11B7alt(b9#11)Balt7b9#11
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).
ASeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
CExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
E#Extension
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
🎼 Related scales
🎹 Modal analysis
This chord implies the Half-whole diminished scale; its characteristic note is the ♭9 / ♭2.
🎸 Genres
Bebop jazz · Hard bop · Gypsy jazz