Progression map
Where can the next chord go? Start on any chord, and the map outlines the ones that work next: the key's own chords in the middle, borrowed and secondary chords further out. Click to hear, and build a progression as you go.
C major
Click any chord to start. Home is a good place.In the keyThe seven chords of C major
Secondary dominantsA V chord aimed at one chord of the key
BorrowedFrom C minor: a shade of dark
Dark cornersSecondary diminished, Neapolitan
Turn on + Dark corners to use these
Your progression
Each chord you click goes on the end. Drag to reorder, × takes one out.Reading the map
Rows go outward. The top row is safe: it always sounds like the key. Each row down adds color, and more risk.
Outlined chords are the good next steps from the chord you're on. Faded ones work too, but they want a different chord before them.
The arrow on a chip (V/V → G) tells you where that chord wants to go. Follow it and the map lights up again from there.
Minor keys are built on harmonic minor, so V is major and vii° is there. The natural-minor v and VII sit in the borrowed row. Pick another scale (melodic minor, Dorian…) to map its chords the same way.