Scales & harmony from B
A theory reference for everything built on the tonic B: the diatonic chords of B major and B natural minor, the progressions they form, and the scale types that start from B.
Key relationships at a glance: the relative minor of B major is G# minor, and B minor shares its key signature with D major. Use the tables to compare harmony side by side, then jump to an instrument to hear the shapes under your fingers.