Amaj13b11 Major 7th
The Amaj13b11 chord is built from the notes A – C# – E – G# – B – C# – F#.
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Chord tones, one by one
ARoot
Root
The fundamental note the chord is built on — A.
C#Third
Major third
Four semitones — makes the chord major (brighter, happier).
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.
C#Extension
Extension (16 st)
An upper extension 16 semitones above the root.
F#Extension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Ionian (major) scale; its characteristic note is the perfect 4th, what sets it apart from Lydian.
🎸 Genres
Pop · Classical · Gospel