The ii V I
Three chords that behave like a sentence with a full stop at the end. It is the signature move of jazz, and the reason it works is not the chords themselves but the bass underneath them: two falling fifths in a row.
- 3 chords
- any key
- the jazz cadence
same family
The progression
ii - V - I
Why it works
Play only the roots and you get D, G, C in the key of C: each one a fifth below the last. Falling fifths are the strongest root movement there is, so the progression already works before you add a single third or seventh. The chords on top sharpen it. The ii sets off, the V adds the tritone that demands a resolution, and the I supplies it.
Hear it in context
Three of our own examples: the bass roots on their own, then plain triads, then seventh chords. Each version resolves and each one sounds more finished than the last.
Make it yours
- Add sevenths
Dm7, G7, Cmaj7 is the standard version and it is where the jazz sound actually comes from.
- Make it minor
Half-diminished ii, dominant V, minor i. Same mechanism, much darker.
- Chain them
Move the target and run several in a row. That is most of what a jazz standard is doing between its melodies.
When to reach for it
Anywhere a phrase needs to end properly. In jazz it is assumed. In pop it is a way of making a turnaround sound deliberate rather than accidental.
When to leave it alone
In modal writing, where a strong cadence collapses the mode back into an ordinary key within a bar. Also in loop-based music, where landing this hard stops the track.