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Modulation (music)

Change from one tonality (tonic, or tonal center) to another / From Wikipedia, the free encyclopedia

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In music, modulation is the change from one tonality (tonic, or tonal center) to another. This may or may not be accompanied by a change in key signature (a key change). Modulations articulate or create the structure or form of many pieces, as well as add interest. Treatment of a chord as the tonic for less than a phrase is considered tonicization.

Modulation is the essential part of the art. Without it there is little music, for a piece derives its true beauty not from the large number of fixed modes which it embraces but rather from the subtle fabric of its modulation.

Charles-Henri Blainville (1767)[2]
Example of modulation from the tonic to the dominant.[1]Play
Key signature change example: C major to C minor.