In West Side Story,the use of the cha-cha melody in the meeting scene,and later in "Maria," is an example of what technique?

Question

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Thematic transformation refers to the technique of taking a musical idea and transforming it to fit a different context or emotional feel. In the case of West Side Story, the cha-cha melody is transformed from a tense and dangerous meeting between rival gangs to a passionate love song between Tony and Maria. This demonstrates the power of music to convey different emotions and meanings through thematic transformation.

In West Side Story,the Use of the Cha-Cha Melody in the Meeting