semicord

F11 F dominant eleventh chord

Notes
F A C Eb G Bb
Formula
1 3 5 b7 9 11
Semitones
0 4 7 10 14 17 above the root
Other symbols
Fdom11

F to A is a major third (4 semitones), A to C is a minor third (3 semitones), C to Eb is a minor third (3 semitones), Eb to G is a major third (4 semitones), G to Bb is a minor third (3 semitones). All six notes stacked in thirds, 1 3 5 b7 9 11. The eleventh, Bb, sits a minor ninth above the third A and clashes with it, so in practice the third is left out: F C Eb G Bb is how F11 is usually played, the same notes as F9sus4. Leave out the fifth as well and the engine hears Eb/F instead (F Eb G Bb), so the guitar shapes here keep C.

F11 on the piano

C4D4E4F4G4A4B4C5D5E5F5G5A5B5C#4Eb4F#4Ab4Bb4C#5Eb5F#5Ab5Bb5C4FACC5EbGBb

Root position from F4: F4, A4, C5, Eb5, G5, Bb5. Middle C is C4.

F11 on the guitar

Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has F as its lowest note.

FFBbBbEbEbBbBbCCGG
E-shape barre, root on the E string at fret 1
1 1 1 3 1 3 (low E to high e)
Sounds F2 Bb2 Eb3 Bb3 C4 G4, third left out
8fr×FFBbBbEbEbGGCC
A-shape barre, root on the A string at fret 8
x 8 8 8 8 8 (low E to high e)
Sounds F3 Bb3 Eb4 G4 C5, third left out

The E-shape and A-shape grips are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play dominant eleventh chords on other roots.

Inversions of F11

An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.

PositionNotes, bass firstNamedListen
Root positionF A C Eb G BbF11
1st inversionA C Eb G Bb FF11/A
2nd inversionC Eb G Bb F ACm13 (also read as F11/C)
3rd inversionEb G Bb F A CF11/Eb
4th inversionG Bb F A C EbF11/G
5th inversionBb F A C Eb GF11/Bb

Where F11 fits

F11 is V11 in Bb major. The eleventh, Bb, is the same note as the fourth of a sus chord and wants to fall to the third A; that is why the third is usually left out, and why F11 works as a softer V that delays the pull home. It often moves to F7 before the tonic.