Chord · B Major 7♯5
Bmaj7♯5 Chord
Bmaj7♯5 is B, D#, G and A# — lydian augmented sound; modern jazz.
Bmaj7♯5 on every instrument
The same 4 notes, 2 sets of hands. Open a diagram for alternate shapes, audio and the mistakes to avoid.
What Bmaj7♯5 is made of
B Major 7♯5 (B major 7♯5) is built from the notes B, D#, G, A#, with the interval pattern 1, 3, #5, 7. A common major 7♯5 chord across many styles.
Stack 1, 3, #5 and 7 on a root of B and you get B, D#, G and A#. That interval recipe is what makes the chord a major seventh sharp five chord — move the same shape to another root and the character travels with it, which is why Cmaj7♯5 sounds like a transposed Bmaj7♯5.
Major 7♯5: Lydian augmented sound; modern jazz.
Spelling: the notes above are written the way a score would write them, not simplified to the nearest piano key. That is why this chord is spelled with D♯ rather than its enharmonic equivalent.
Keys that contain Bmaj7♯5
No major or natural-minor key contains all 4 of these notes — this one gets borrowed.
Chords like this one sit outside the diatonic set — they arrive as secondary dominants, borrowed chords or passing harmony. Browse every key to see which progressions pull it in.
Other chords on B
Same root, different colour.
The same major seventh sharp five shape, moved
The identical interval recipe, built on other roots.
Questions people ask about Bmaj7#5
- What notes are in the Bmaj7#5 chord?
- Bmaj7#5 is made of B, D#, G and A# — the 1, 3, #5 and 7 degrees of a major seventh sharp five chord built on B.
- What keys use the Bmaj7#5 chord?
- No major or natural-minor key contains all 4 notes of Bmaj7#5. Chords like this arrive as borrowed harmony — secondary dominants, harmonic-minor colour, or chromatic passing chords — rather than as one of a key's native chords.
- How do you play Bmaj7#5 on guitar and piano?
- This page shows Bmaj7#5 on guitar and piano — 4 voicings in total. Each diagram links to the full instrument page with alternate shapes, audio and common mistakes.
Learn the theory behind it
Why Bmaj7♯5 behaves the way it does — the guides that explain the chord instead of just spelling it.