B7♯5
B Dominant 7th Sharp 5 — the augmented dominant — the raised fifth leans hard into the resolution a fifth below.
The keys
B – D♯ – G – A
What's inside B7♯5
| Note | Interval from root | Degree |
|---|---|---|
| B | Root | 1 |
| D♯ | Major 3rd | 3 |
| G (spelled F♯♯) | Augmented 5th | #5 |
| A | Minor 7th | b7 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | B4 – E♭5 – G5 – A5 |
| 1st inversion | E♭5 – G5 – A5 – B5 |
| 2nd inversion | G5 – A5 – B5 – E♭6 |
| 3rd inversion | A5 – B5 – E♭6 – G6 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | B2 – A3 |
| Right (colour) | E♭5 – G5 |
Where B7♯5 lives
Hard resolution
B7♯5 → Em9
Altered dominants resolve with maximum drama — especially into minor.
Chromatic approach
G♭m7 → B7♯5 → E
The alteration sharpens the pull of the standard two-five.
Put B7♯5 under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →