Also written B♭ Locrian — the same pitches spelled the other way.
The 7th mode of the major scale — a diminished tonic and a flat 2nd and 5th. Rare as a key centre, common over m7b5 chords.
| Notes | A#, B, C#, D#, E, F#, G# |
|---|---|
| Steps | H – W – W – H – W – W – W (W = whole, H = half) |
Root notes are red. The full map of the scale on the guitar neck; the common box patterns are groups of these notes.
The same scale on a ukulele in standard G–C–E–A tuning.
| Degree | Triad | 7th chord |
|---|---|---|
| i° | A♯dim | A♯m7♭5 |
| ♭II | B | Bmaj7 |
| ♭iii | C♯m | C♯m7 |
| iv | D♯m | D♯m7 |
| ♭V | E | Emaj7 |
| ♭VI | F♯ | F♯7 |
| ♭vii | G♯m | G♯m7 |
These are the chords built by stacking scale notes in thirds. Click through for each chord's own diagrams:
See the diatonic chords with audio in the Scale & Chord Finder, find where a key sits among the others on the Circle of Fifths, or start the free Cloud Atelier music guides.