Gmaj13#9 Major 7th
The Gmaj13#9 chord is built from the notes G – B – D – F# – A# – E.
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Chord tones, one by one
GRoot
Root
The fundamental note the chord is built on — G.
BThird
Major third
Four semitones — makes the chord major (brighter, happier).
DFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
F#Seventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
A#Extension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
EExtension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
Lydian ♯2harmonic minor a major 3rd below
🎹 Modal analysis
This chord implies the Lydian ♯2 scale; its characteristic note is the ♯2 / ♯9 (augmented 2nd). It is a mode of the harmonic minor a major 3rd below.
🎸 Genres
Gypsy jazz · Roma music · Klezmer · Classical