C♭ Dominant 7th Sharp 11
Notes:C♭ – E – G – B♭ – G♭
Formula:R-M3-A4-P5-m7
Intervals:P1-M3-A4-P5-m7
Scale Degrees:1-3-#4-5-b7
Introduction
The Cb Dominant 7th Sharp 11 piano chord (Cb7\u266f11) consists of the notes Cb, E, Gb, G, Bb. It is a dominant 7th chord with an augmented (sharpened) 11th, creating a distinctive tritone clash, giving it a tense, tritone-driven character central to the Lydian Dominant sound in jazz and fusion. Formula: R-M3-A4-P5-m7 | Scale degrees: 1-3-#4-5-b7.
Notes
Key Signature
The key of Cb Dominant 7th Sharp 11 has 7 flats: B♭, E♭, A♭, D♭, G♭, C♭, F♭.
B♭E♭A♭D♭G♭C♭F♭
Theory: Intervals
Formula: R-M3-A4-P5-m7
Intervals: P1-M3-A4-P5-m7
The C♭ Dominant 7th Sharp 11 is built by stacking intervals from the root note. The formula R-M3-A4-P5-m7 describes the scale degrees used. The intervals P1-M3-A4-P5-m7 show the distance between each note in the chord.
C♭ Dominant 7th Sharp 11 — Frequently Asked Questions
What notes are in the Cb Dominant 7th Sharp 11 chord?
Cb7#11 is the enharmonic equivalent of B7#11. Same notes.
How does Cb7#11 differ from Cb7?
Adds the #11.
How is Cb7#11 used?
Musicians use B7#11 in practice.
What scale matches Cb7#11?
Cb Lydian Dominant (enharmonically B Lydian Dominant).
What songs use 7#11?
Sound identical regardless of spelling.
Do I need both spellings?
Learn B7#11 and understand the enharmonic relationship.
Practice Tips
- Cb7#11 and B7#11 are enharmonic.
- Translate to B7#11.
- Keyboard notes identical.
- Lydian Dominant sound.
- Understanding both builds fluency.
- The #11 adds brightness to any dominant.