A-9(#11maj7) Minor-Major 7th
The A-9(#11maj7) chord is built from the notes A – C – E – G# – B – D#.
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Also known as
Am(maj9#11)Ami(maj9#11)Ammaj9#11
Chord tones, one by one
ARoot
Root
The fundamental note the chord is built on — A.
CThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
EFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
G#Seventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
BExtension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
D#Extension
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
🎼 Related scales
Lydian ♭3harmonic major scale
🎹 Modal analysis
This chord implies the Lydian ♭3 scale; its characteristic note is the ♭3 over a Lydian color. It is a mode of the harmonic major scale.
🎸 Genres
Modern jazz · Post-bop · Fusion