Add11 chord - piano
The add11 chord enriches the major triad with a perfect eleventh (equivalent to a fourth at the octave), without seventh or ninth. This addition creates a modal and suspended sound.
Intervals
| Degree | I | III | V | XI |
|---|---|---|---|---|
| Interval | Root | Major third | Perfect fifth | Perfect eleventh |
| Semitones | 0 | 4 | 7 | 17 |
Formula 1 - 3 - 5 - 11
Theory
The add11 chord adds a perfect eleventh (17 semitones) to the major triad. C add11 = C-E-G-F, G add11 = G-B-D-C. The eleventh creates harmonic friction with the major third (a semitone apart). The third is often omitted to avoid this friction, creating a more open sound close to sus4.
Examples
Example: Do Add11
Diagrammes non disponibles pour cet accord.
Styles
Construction
Formula 1 - 3 - 5 - 11: triad + perfect eleventh. Rare, open modal color.
Learning
Modal contexts. Ambient, film music.
How to play
Modal, atmospheric. Rare in practice. Extended open positions.