Construction
F Major 9♯11 = Root + Major 3rd + Perfect 5th + Major 7th + Major 2nd + Diminished 5th = F, A, C, E, G, B
| Note | Interval | Degree |
|---|---|---|
| F | Root | 1 |
| A | Major 3rd | 3 |
| C | Perfect 5th | 5 |
| E | Major 7th | 7 |
| G | Major 2nd | 9 |
| B | Diminished 5th | ♭5 |
Key Signature
A chord has no key signature of its own, but the F Major 9♯11 is the tonic (I) chord of F Major, whose key signature has 1 flat (B♭).
B♭
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
B♭E♭A♭D♭G♭C♭F♭
Mnemonic: Battle Ends And Down Goes Charles’ Father
Chords in the Key of F Major
These are the triads built on each degree of F Major:
F Major 9♯11 : Frequently Asked Questions
What is the F Major 9♯11 chord on piano?
The F Major 9♯11 chord contains the notes F – A – C – E – G – B. On piano, play these notes together to sound the chord.