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In music, modulation is most commonly the act or process of changing from one key (tonic, or tonal center) to another. This may or may not be accompanied by a change in key signature. 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. ==Requirements== *Harmonic: quasi-tonic, modulating dominant, pivot chord〔Forte (1979), p.267.〕 *Melodic: recognizable segment of the scale of the quasi-tonic or strategically placed leading-tone〔 *Metric & rhythmic: quasi-tonic and modulating dominant on metrically accented beats, prominent pivot chord〔 The quasi-tonic is the tonic of the new key established by the modulation. The modulating dominant is the dominant of the quasi-tonic. The pivot chord is a predominant to the modulating dominant and a chord common to both the keys of the tonic and the quasi-tonic. For example, in a modulation to the dominant, ii/V-V/V-V could be a pivot chord, modulating dominant, and quasi-tonic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Modulation (music)」の詳細全文を読む スポンサード リンク
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