F9#11 Dominant 7th
The F9#11 chord is built from the notes F – A – C – Eb – G – B.
Piano sound loads on first tap.
Also known as
F#11F9(#11)F9(#4)
Chord tones, one by one
FRoot
Root
The fundamental note the chord is built on — F.
AThird
Major third
Four semitones — makes the chord major (brighter, happier).
CFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
EbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
GExtension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
BExtension
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
🎼 Related scales
Lydian dominant (acoustic)melodic minor a perfect 4th below
🎹 Modal analysis
This chord implies the Lydian dominant (acoustic) scale; its characteristic note is the ♯11 over a ♭7 (the acoustic sound). It is a mode of the melodic minor a perfect 4th below.
🎸 Genres
Jazz fusion · Modal jazz · Bossa/MPB