Bb Aeolian

The Bb Aeolian mode (also written A#) — Bb C Db Eb F Gb Ab — shown across the guitar neck.

Also written A# Aeolian. A# and Bb are the same pitch — Bb is the spelling in common use.

Swipe the neck sideways to see the higher frets.

Bb Aeolian is the natural minor — same seven notes, same order. The mode name describes which chord you treat as home, not a different set of notes.

The tool shows this from its parent key, Db major, with Bb marked as where Aeolian begins, the same seven notes centered on Db.