Ab11

Theory

The dominant eleventh chord extends the dominant ninth by adding a perfect eleventh (17 semitones = an octave plus a perfect fourth). Ab11 uses Ab, C, Eb, F#, Bb, C#. The perfect eleventh is the same pitch class as the perfect fourth, which gives the chord a strong sus4-like quality when voiced. The combination of the flat seventh (dominant tension) and the eleventh (suspension) creates a complex, floating sound. In jazz, the eleventh chord often works as a V chord where the eleventh is voiced above the ninth for a stacked, modern sound. In practice, the major third is frequently omitted to avoid the clash with the eleventh (a semitone above the major third in a different octave).

Intervals & Formula

Formula: 1 – 3 – 5 – ♭7 – 9 – 11

Musical Meaning

Dominant seventh chords are the harmonic engine that drives music forward. Their combination of major third and minor seventh creates tension that pulls powerfully toward the tonic — making them the most directional chord in Western music.

Sounds Like This

⚡ Other tense sounds to explore

Voicing Tips

In practice, the eleventh chord often omits the third (to avoid the tritone clash between major third and perfect eleventh). Voiced without the third, it has a strong sus4 quality. Try root–flat-seventh in the left hand with ninth–eleventh–flat-seventh in the right for a modern, open sound.

Practical Uses

• V11 chord in jazz and gospel — a complete dominant sound with the eleventh adding lift
• Coloristic choice in neo-soul and contemporary R&B keyboard writing
• Creates a suspended-dominant hybrid sound (eleventh = fourth)
• Final chord before resolution in complex jazz progressions

Common Progressions

Related Chords