Ab+(maj9) Augmented
The Ab+(maj9) chord is built from the notes Ab – C – E – G – Bb.
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Also known as
Ab+maj9Abma9#5Abma9(#5)Abmaj9#5Abmaj9(#5)
Chord tones, one by one
AbRoot
Root
The fundamental note the chord is built on — Ab.
CThird
Major third
Four semitones — makes the chord major (brighter, happier).
EFifth
Augmented fifth (♯5)
Eight semitones — a sharp fifth. Restless and dreamy, typical of augmented chords.
GSeventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
BbExtension
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