Scales & harmony from A# / Bb

A theory reference for everything built on the tonic A# / Bb: the diatonic chords of Bb major and Bb natural minor, the progressions they form, and the scale types that start from A#.

Key relationships at a glance: the relative minor of Bb major is G minor, and Bb minor shares its key signature with Db major. Use the tables to compare harmony side by side, then jump to an instrument to hear the shapes under your fingers.