Bb7#11

General info

Full name

Bb 7#11

Symbol

Bb7#11

Root

Bb

Quality

7#11

Chord notes

Functions & resolutions

Stability / tension

Stable — can serve as major tonic

Most common resolutions

EbEb MajorFF MajorGmG Minor

Unstable degrees

4Eb

b7Ab

resolves down to the resolution tonic

Main resolution

Bb7#11source

FF Major

Major chord Bb is a stable tonic. As tonic it doesn't require resolution, but in a progression context typically moves to IV or V.

Other resolutions

Bb7#11source

Deceptive resolution

GmG Minor

As the V degree, a major chord can defy expectations by moving to vi instead of I (deceptive cadence).

Bb7#11source

Modal resolution

AbAb Major

In modal context, a major chord can freely move to bVII, bIII, or bVI — characteristic of Mixolydian mode.

Bb7#11source

Jazz reharmonization

Bbmaj7Bb Major 7

In jazz, a major chord is enriched to maj7, 6/9, or add9 and can smoothly transition into a ii-V of another key (modulation).

Bb7#11source

Functional resolution

FF Major

As the IV degree (subdominant), a major chord can resolve to V or directly to I (plagal cadence).

Substitutions

Tritone substitution

E7E Dominant 7

Features

Character

Dominant, with an augmented 11th

Characteristic interval

Minor 7th (b7), Augmented 11th (#11)

Description

The minor 7th establishes dominant function, while #11 adds a tritone against the root. The set 1–3–b7–#11 fits a Lydian dominant context.

Application

• Lydian dominant
• Tritone substitution
• Jazz voice leading

Voicing & structure

Harmony

Compatible scales

All chord tones are contained in these scales — use them for improvisation.