Harmony

Given a key, decide which chord belongs — then play it.

Follow On

Start on the home chord and play whatever you think comes next. Each chord is named and the move is rated with a reason; after four to eight chords the phrase is scored on function flow, its cadence, and how often the root falls by a fifth.

Numeral Deck

The Numeral Deck schedules what you have actually derived, so it needs an account to remember it.