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B Dominant 7th Sharp 11

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B7♯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

B Dominant 7th Sharp 11 piano chord, root position — B, D#, F#, A, F
The B Dominant 7th Sharp 11 chord in root position on a piano keyboard, notes B, D#, F#, A, F.

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 B Dominant 7th Sharp 11 has 5 sharps.

F♯C♯G♯D♯A♯

Order of sharps

Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.

FCGDAEB

Mnemonic: Father Charles Goes Down And Ends Battle

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
IB Major (major)
DegreeNumeralChordQuality
1IB MajorMajor
2iiC♯ MinorMinor
3iiiD♯ MinorMinor
4IVE MajorMajor
5VF♯ MajorMajor
6viG♯ MinorMinor
7vii°A♯ DiminishedDiminished

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.

B Dominant 7th Sharp 11 — Frequently Asked Questions

What notes are in the B Dominant 7th Sharp 11 chord?
B7#11 contains: B, D#, E#, F#, A. Lydian Dominant sound.
How does B7#11 differ from B7?
Adds E# (the #11, enharmonically F).
How does B7#11 differ from B11?
B11 has E (clashes with D#). B7#11 has E# which doesn't clash.
How is B7#11 used?
Lydian Dominant. Jazz. Tritone sub for F7.
What scale matches B7#11?
B Lydian Dominant — 4th mode of F# melodic minor.
What songs use 7#11?
Modern jazz, fusion.

Practice Tips

  • Play B7 then add E#/F — Lydian Dominant brightness.
  • The #11 doesn't clash with the third.
  • Tritone sub for F7.
  • Lydian Dominant scale.
  • Practice B7#11 → E resolution.
  • Jazz and fusion applications.

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