Chord Progressions Explained

What is a Chord Progression?

A chord progression is a sequence of chords played one after another. Individual chords are interesting, but music is about how they move — the tension and release, the sense of going somewhere and arriving. Almost every song you've ever heard is built on a small set of recurring progressions that have proven to carry emotional meaning across centuries of music.

Diatonic Chords — The Chords That Belong Together

When you stack thirds on each note of a major scale, you get a family of chords that naturally fit together — called diatonic chords. In C major, these are: C major (I), D minor (ii), E minor (iii), F major (IV), G major (V), A minor (vi), B diminished (viio). Roman numerals label each chord's position in the key. Uppercase means major, lowercase means minor.

Tip Memorize the diatonic chord quality pattern for major keys: I ii iii IV V vi vii°. It works in every key.

The I-IV-V Progression — The Foundation

The I-IV-V progression is the backbone of blues, rock, folk, and country. In C major: C major → F major → G major. The V chord (G) creates tension that strongly pulls toward the I chord (C) — this pull is called dominant function and it's one of the most important forces in tonal music. Thousands of songs are built on nothing but I-IV-V.

The I-V-vi-IV Progression — The Pop Favorite

The I-V-vi-IV progression is one of the most common sequences in contemporary music. In C major: C major → G major → A minor → F major. It appears in an enormous number of hit songs across every genre. The vi chord (A minor, the relative minor) adds emotional depth without leaving the key. The IV chord (F major) provides a satisfying landing before the cycle repeats.

Tension and Resolution

Music gets its emotional power from tension and resolution. Some chords feel unstable — they pull toward other chords. The V chord (the dominant) is the most powerful source of tension, pulling strongly toward the I chord (the tonic). Cadences — the endings of musical phrases — are defined by which chords they use and how strongly they resolve. A authentic cadence (V→I) feels like a full stop. A half cadence (ending on V) leaves you waiting.

Tip If a chord feels like it needs to go somewhere, you're probably hearing dominant function pulling toward the tonic.

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