B♭ Dominant 7th Sharp 11

Also known as A♯ Dominant 7th Sharp 11

Same keys, different spelling.

Open A♯ Dominant 7th Sharp 11 →Same chord, spelled with sharps What are enharmonics? →Why one chord has two names

Jump to any chord

Root

Chord type

Listen plays the chord. Play Along lights up each note in order so you can follow.

B♭7♯11

B♭ – D – E – F – A♭

Formula:R-M3-A4-P5-m7

Intervals:P1-M3-A4-P5-m7

Scale Degrees:1-3-#4-5-b7

Introduction

Bb Dominant 7th Sharp 11 piano chord, root position — Bb, D, F, Ab, E — The Bb Dominant 7th Sharp 11 chord in root position on a piano keyboard, notes Bb, D, F, Ab, E.

The B♭ Dominant 7th Sharp 11 chord is a five-note chord made up of B♭, D, E, F, and A♭. It is built from a root, major third, augmented fourth, perfect fifth, and minor seventh.

Notes

Notes:B♭ – D – E – F – A♭

Key Signature

The key of Bb Dominant 7th Sharp 11 has 2 flats.

B♭E♭

Order of flats

Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.

B♭E♭A♭D♭G♭C♭F♭

Mnemonic: Battle Ends And Down Goes Charles’ Father

Chords in the Key of B♭ Major

These are the diatonic triads built on each degree of the B♭ major scale:

I — B♭ Major (major)

Degree	Numeral	Chord	Quality
1	I	B♭ Major	Major
2	ii	C Minor	Minor
3	iii	D Minor	Minor
4	IV	E♭ Major	Major
5	V	F Major	Major
6	vi	G Minor	Minor
7	vii°	A Diminished	Diminished

Theory: Intervals

Formula: R-M3-A4-P5-m7

Intervals: P1-M3-A4-P5-m7

The B♭ 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.