What Is a ii-V-I, Really? It’s How Songs Learned to End
The ii-V-I is a cadence — the classical art of ending a piece — with one extra link of circle-of-fifths bass motion bolted on. Understand it as an ending and every ii-V in the middle of a tune suddenly makes sense.
Hearing Harmonic Rhythm: How Dominant Function Drives the II–V–I
If you’ve been playing jazz guitar for a few years, you already know what a II–V–I progression looks like. You can name the chords, you can find them on the fretboard, you can probably improvise a passable line over them in a familiar key.