Mode
A Locrian
The A Locrian mode — A Bb C D Eb F G — shown across the guitar neck.
Swipe the neck sideways to see the higher frets.
A Locrian is the natural minor with the b2 and b5 — Bb and Eb. Those are the notes that give it its character.
Notes
A Bb C D Eb F G
Intervals
1 b2 b3 4 b5 b6 b7
Parent scale
Bb Major
Degree of parent
7
The tool shows this from its parent key, Bb major, with A marked as where Locrian begins, the same seven notes centered on Bb.