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Chord Progressions
Common Harmonic Patterns in Songs
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Chord progressions are sequences of chords that create motion, tension, and release in music. They help listeners recognize patterns, feel emotional direction, and predict where a song might go next. In many styles, progressions are the framework that supports melody, rhythm, and form. Learning how they work helps students analyze songs and write their own music more effectively.
Most chord progressions are built from chords that belong to a key, and each chord has a function such as stability, movement, or resolution. In tonal music, progressions often move from tonic to predominant to dominant and back to tonic, creating a sense of departure and return. Roman numerals like I, IV, V, and vi show chord relationships independent of key, which makes patterns easy to compare across songs. Sound perception also matters because listeners hear some chord changes as smooth and expected, while others sound surprising because of interval relationships and voice leading.
Key Facts
- A chord progression is an ordered series of chords, often labeled with Roman numerals such as I - V - vi - IV.
- In a major key, the diatonic triads are I, ii, iii, IV, V, vi, and vii°.
- Functional harmony often follows tonic -> predominant -> dominant -> tonic.
- A common authentic cadence is V - I, which strongly suggests resolution to the home chord.
- In C major, the progression I - IV - V - I is C - F - G - C.
- Smooth voice leading keeps common tones and moves other notes by small intervals when possible.
Vocabulary
- Chord progression
- A chord progression is a sequence of chords played in a specific order to create musical structure and direction.
- Tonic
- The tonic is the home chord or tonal center that feels most stable in a key.
- Dominant
- The dominant is the chord built on the fifth scale degree and usually creates tension that wants to resolve to the tonic.
- Roman numeral analysis
- Roman numeral analysis labels chords by their scale degree so the same pattern can be recognized in any key.
- Voice leading
- Voice leading is the way individual notes move from one chord to the next, usually aiming for smooth and efficient motion.
Common Mistakes to Avoid
- Treating chord names and Roman numerals as the same thing, which is wrong because chord names depend on the key while Roman numerals show function within the key.
- Using only random chords from outside the key, which is wrong because beginners often lose tonal center and make the progression sound disconnected unless non-diatonic chords are used deliberately.
- Ignoring chord function, which is wrong because progressions usually sound clearer when stable, moving, and resolving chords are balanced.
- Moving every note by large jumps, which is wrong because poor voice leading can make even a correct progression sound rough and harder for listeners to follow.
Practice Questions
- 1 In the key of G major, write the chord names for the progression I - vi - IV - V.
- 2 In C major, a song uses the progression ii - V - I. Name the three chords and identify which chord has dominant function.
- 3 A progression ends with V - I in a major key. Explain why listeners usually hear this ending as complete and resolved.