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B♭ mi11♭5

Also known as A♯ mi11♭5
Same keys, different spelling.
Open A♯ mi11♭5 →Same chord, spelled with sharpsWhat are enharmonics? →Why one chord has two names
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Listen plays the chord. Play Along lights up each note in order so you can follow.

B♭m11♭5
B♭ – D♭ – F♭ – A♭ – C – E♭
Formula:R-m3-d5-m7-M9-P11
Intervals:P1-m3-d5-m7-M9-P11
Scale Degrees:1-b3-b5-b7-9-11

Introduction

Bb mi11♭5 piano chord, root position — Bb, Db, E, Ab, C, Eb
The Bb mi11♭5 chord in root position on a piano keyboard, notes Bb, Db, E, Ab, C, Eb.

The B♭ mi11♭5 chord is a six-note chord made up of B♭, D♭, F♭, A♭, C, and E♭. It is built from a root, minor third, diminished fifth, minor seventh, major ninth, and perfect eleventh.

Notes

Notes:B♭ – D♭ – F♭ – A♭ – C – E♭

Key Signature

The key of Bb mi11♭5 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:

C
D
E
F
G
A
B
C
D
E
F
G
A
B
I — B♭ Major (major)
DegreeNumeralChordQuality
1IB♭ MajorMajor
2iiC MinorMinor
3iiiD MinorMinor
4IVE♭ MajorMajor
5VF MajorMajor
6viG MinorMinor
7vii°A DiminishedDiminished

Theory: Intervals

Formula: R-m3-d5-m7-M9-P11
Intervals: P1-m3-d5-m7-M9-P11

The B♭ mi11♭5 is built by stacking intervals from the root note. The formula R-m3-d5-m7-M9-P11 describes the scale degrees used. The intervals P1-m3-d5-m7-M9-P11 show the distance between each note in the chord.

B♭ mi11♭5 — Frequently Asked Questions

What notes are in the Bb mi11♭5 chord?
The Bb mi11♭5 chord (Bbmi11♭5) contains 6 notes: Bb, Db, E, Ab, C, Eb. Formula: R-m3-d5-m7-M9-P11.
How is Bbmi11♭5 used in music?
Bbmi11♭5 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for Bbmi11♭5?
Bbmi11♭5 uses scale degrees 1-b3-b5-b7-9-11, giving it its distinctive sound.

Practice Tips

  • Start by placing your thumb on Bb and spacing remaining fingers across the chord.
  • Practice Bbmi11♭5 slowly with separate hands before combining.
  • Listen carefully to the tension created by the altered tones in this chord.
  • Try voicing Bbmi11♭5 in different octaves to find the most comfortable position.
  • Resolve Bbmi11♭5 to a nearby chord to hear its function in context.

Related Tools

Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.