In what kind of work would one most likely expect to encounter the technique of the idée fixe?

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The idée fixe is a musical technique that was popularized by French composer Hector Berlioz, particularly in his Symphony Fantastique. It involves a recurring melody or theme that represents a particular character, emotion, or idea throughout a musical work. Therefore, it is most likely to be encountered in a symphony or other large-scale musical composition.

In What Kind of Work Would One Most Likely Expect