F#addb9 Major
The F#addb9 chord is built from the notes F# – A# – C# – G.
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Chord tones, one by one
F#Root
Root
The fundamental note the chord is built on — F#.
A#Third
Major third
Four semitones — makes the chord major (brighter, happier).
C#Fifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
GExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
🎼 Related scales
🎹 Modal analysis
This chord implies the Double harmonic major (Byzantine) scale; its characteristic note is the ♭9 / ♭2.
🎸 Genres
Flamenco · Middle-Eastern · Klezmer · Neoclassical metal