Eleventh Chords
An 11th chord is a 9th chord with one more tone stacked on top — but that one extra tone behaves very differently depending on what kind of chord it's sitting on.
Stacking to the 11th
An 11th chord takes a 9th chord (root, 3rd, 5th, 7th, 9th) and adds an 11th — a perfect 4th, an octave higher — on top. That's a six-note stack, though real-world voicings rarely play every tone.
The dominant 11th problem
On a dominant 7th chord, the natural 11th sits just a half step above the chord's major 3rd — a harsh, muddy clash. Players solve it one of two ways: raise the 11th to a #11 (moving it a whole step above the 3rd), or simply drop the 3rd entirely, letting the 7th carry the dominant color instead.
Minor and major 7 chords: no problem
On minor 7 or major 7 chords, the natural 11th sits comfortably away from the minor or major 3rd — no clash, no fix needed. That's why you'll see chords like Cm11 voiced with the plain, unaltered 11th all the time, while a dominant "C11" almost always gets special treatment.
Common questions
What is an 11th chord?
A 9th chord with an 11th added on top — root, 3rd, 5th, 7th, 9th, and 11th.
Why does the natural 11th clash on a dominant chord?
It sits a half step above the major 3rd, creating a harsh rub — usually fixed by raising it to #11 or dropping the 3rd.
Does the clash happen on minor 11 chords too?
No — on minor 7 or major 7 chords, the natural 11th sits comfortably away from the 3rd, so no adjustment is needed.
How is C11 usually voiced in practice?
Often without the 3rd at all — just root, 7th, 9th, and 11th — removing the clash while keeping the dominant color.
Stack extensions and hear them instantly
Melody Monkey's Songwriting Studio lets you add 9ths, 11ths, and 13ths to any chord with one click.
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