F Dominant 7th Sharp 11
Notes:F – A – C – Eb – B
Formula:R-M3-A4-P5-m7
Intervals:P1-M3-A4-P5-m7
Scale Degrees:1-3-#4-5-b7
Introduction
The F Dominant 7th Sharp 11 piano chord (F7\u266f11) consists of the notes F, A, B, C, Eb. It is a dominant 7th chord with an augmented (sharpened) 11th, creating a distinctive tritone clash, giving it a tense, tritone-driven character central to the Lydian Dominant sound in jazz and fusion. Formula: R-M3-A4-P5-m7 | Scale degrees: 1-3-#4-5-b7.
Notes
F Dominant 7th Sharp 11 Inversions
| Position | Notes |
|---|---|
| Root Position | F4 – A4 – C5 – Eb5 – B5 |
| 1st Inversion | A4 – B4 – C5 – Eb5 – F5 |
| 2nd Inversion | B4 – C5 – Eb5 – F5 – A5 |
Key Signature
The key of F Dominant 7th Sharp 11 has 1 flat: B♭.
B♭
Theory: Intervals
Formula: R-M3-A4-P5-m7
Intervals: P1-M3-A4-P5-m7
The F Dominant 7th Sharp 11 is built by stacking intervals from the root note. The formula R-M3-A4-P5-m7 describes the scale degrees used. The intervals P1-M3-A4-P5-m7 show the distance between each note in the chord.
F Dominant 7th Sharp 11 — Frequently Asked Questions
What notes are in the F Dominant 7th Sharp 11 chord?
F7#11 contains: F, A, B, C, Eb. Lydian Dominant sound.
How does F7#11 differ from F7?
Adds B (the #11). Brighter and more complex.
How does F7#11 differ from F11?
F11 has Bb (clashes with A). F7#11 has B which doesn't clash.
How is F7#11 used in music?
Lydian Dominant. Jazz. Tritone sub for B7. Common as the IV7#11 in C Major.
What scale matches F7#11?
F Lydian Dominant: F, G, A, B, C, D, Eb — 4th mode of C melodic minor.
What songs use 7#11?
Modern jazz. F7#11 as IV7 in C is a classic jazz colour.
Practice Tips
- Play F7 then add B — Lydian Dominant brightness.
- F7#11 as the IV7 in C Major is a classic jazz sound.
- The #11 (B) doesn't clash with the third (A).
- Lydian Dominant scale: F–G–A–B–C–D–Eb.
- Tritone sub for B7.
- Practice F7#11 → Bb resolution.