Music Term
What is a modulation?
Definition
Modulation is the process of changing from one key to another within a piece of music, used to create contrast, heighten tension, or provide a sense of elevation or surprise.
Modulation in music -- explained
In tonal music, modulation is one of the most powerful structural tools available. A common type is the 'truck driver modulation' (also called a chromatic modulation or key change) where a song shifts up a semitone or whole tone at the final chorus -- an emotional lift device used in pop ballads from the 1970s onward. More sophisticated modulations involve pivot chords (chords that exist in both the original key and the new key, allowing a smooth transition) or sudden, jarring shifts with no common ground. Modulation to the dominant (a fifth up) was the core structural move of classical sonata form. Modulation to the relative minor (moving from a major key to its parallel minor, sharing the same notes) creates a more melancholy character. Contemporary pop uses modulation less frequently than it did in the 1970s-80s, but when it appears it remains highly effective at signalling climax.
Notable examples of a modulation
Man in the Mirror -- Michael Jackson
The final chorus modulates up a whole step, intensifying the emotional plea at the song's climax.
A Day in the Life -- The Beatles
Multiple key areas are explored through the song's two distinct sections, unified by the final orchestral glissando.
I Will Always Love You -- Whitney Houston
The final verse modulates up a step after the bridge -- one of the most famous truck driver modulations in pop.
Related music terms
Frequently asked questions
- What is a modulation in music?
- Modulation is the process of changing from one key to another within a piece of music, used to create contrast, heighten tension, or provide a sense of elevation or surprise.
- What is an example of a modulation?
- A well-known example is Man in the Mirror by Michael Jackson: The final chorus modulates up a whole step, intensifying the emotional plea at the song's climax.
- How is a modulation used in music?
- In tonal music, modulation is one of the most powerful structural tools available. A common type is the 'truck driver modulation' (also called a chromatic modulation or key change) where a song shifts up a semitone or whole tone at the final chorus -- an emotional lift device used in pop ballads from the 1970s onward.
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