Keys
Key signatures and the circle of fifths
All 30 keys: how many sharps or flats each one has, the scale, the chords that belong to it and its closest neighbours. Pick a key on the circle or in the list.
The circle of fifths
Going clockwise, each key is a fifth higher and adds one sharp. Going anticlockwise, each key adds one flat. The inner ring shows each key's relative minor, which shares its key signature. Tap a key to open it.
How the circle of fifths works