F#-13#9 Minor 7th
The F#-13#9 chord is built from the notes F# – A – C# – E – G## – B – D#.
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Also known as
F#m13#9
Chord tones, one by one
F#Root
Root
The fundamental note the chord is built on — F#.
AThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
C#Fifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
ESeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
G##Extension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
BExtension
Eleventh (11)
An 11th — a suspended, airy color on top of the chord.
D#Extension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Dorian scale; its characteristic note is the major 6th (13).
🎸 Genres
Modal jazz · Funk · Soul · Rock