B+(#11) Guitar Chord | How To Create and Play the B Augmented Fifth Sharp Eleventh added chord
B+(#11) is the B augmented sharp eleven chord: B, D#, F## and E#, built as root, major third, raised fifth and sharp eleventh.
The sharp eleventh is the note that gives the Lydian mode its character. Notes such as F## and E# are written that way to keep one letter name per chord tone, even though they sound like simpler notes. Every note of B+(#11) sits inside the B whole-tone scale, so that scale is the natural place to look for melody notes.
The fretboard interval patterns in our theory guide show how note distances look across the strings. The sharp eleventh sits a tritone above the root, six semitones up.
B augmented with sharp 11th guitar chord is also written as B+(#11), Baug(#11), B+#11 or Baug#11.
B +(#11) chord Notes:
Tones of the Augmented Fifth Sharp Eleventh added chord:
Formula: 1 3 #5 #11
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Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What is B+(#11) made of?
B+(#11) is spelled B, D#, F## and E#. That is a root, a major third, a raised fifth and a sharp eleventh. The F## and E# are theoretical spellings.
Why does B augmented sharp eleven contain E#?
The perfect fourth of B is E. The sharp eleventh raises it by a semitone, giving E#, which sounds like F. Keeping the letter E marks it as the eleventh.
Which scale covers B+(#11)?
The B Whole-Tone Scale (B, C#, D#, E#, F##, A) contains all four notes of the chord. Each one is part of the scale.
What is the difference between B+(#11) and a B augmented triad?
The triad has B, D# and F##. B+(#11) adds E# on top, so it has four notes and no seventh.
