A6/9 Sixth
The A6/9 chord is built from the notes A – C# – E – F# – B.
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Also known as
A69Amaj6/9Amajadd6add9
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.
F#Sixth
Major sixth
Nine semitones — a major 6th. Adds a sweet, nostalgic color without the seventh's tension (6, m6).
BExtension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
🎼 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