Scales & harmony from C# / Db

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

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