The ii–V–I Progression in Jazz: Theory and Application

Wed, 25 Mar 2026 09:00:00 +0000

If you learn one thing about jazz harmony, make it this: ii–V–I. This three-chord progression is the backbone of jazz. It appears in nearly every standard, often multiple times within a single tune, and understanding it unlocks the logic behind hundreds of songs that might otherwise seem harmonically complex.

What Is a ii–V–I?

The Roman numerals refer to diatonic chords built on the second, fifth, and first degrees of a major scale. In jazz, these chords are almost always played as seventh chords.

Extended Chords and Jazz Harmony: 9ths, 11ths, and 13ths

Sun, 15 Feb 2026 10:00:00 +0000

Once you are comfortable with seventh chords, the next frontier is extended chords — 9ths, 11ths, and 13ths. These are the sounds that define jazz, neo-soul, R&B, gospel, and lo-fi hip hop. They add richness, complexity, and emotional depth that simple triads and seventh chords cannot achieve on their own.

This guide explains how extended chords are built, the most common types, and how musicians actually voice and use them in practice.

Jazz Harmony on Interactive Chord Finder

The ii–V–I Progression in Jazz: Theory and Application

What Is a ii–V–I?

Extended Chords and Jazz Harmony: 9ths, 11ths, and 13ths