In rondo form, a principal theme (sometimes called the “refrain”) alternates with one or more contrasting themes, generally called “episodes,” but also occasionally referred to as “digressions” or “couplets.” Possible patterns in the Classical period include: ABA, ABACA, or ABACABA. The number of themes can vary from piece to piece, and the recurring element is sometimes embellished and/or shortened in order to provide for variation.
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Answer:
In rondo form, a principal theme (sometimes called the “refrain”) alternates with one or more contrasting themes, generally called “episodes,” but also occasionally referred to as “digressions” or “couplets.” Possible patterns in the Classical period include: ABA, ABACA, or ABACABA. The number of themes can vary from piece to piece, and the recurring element is sometimes embellished and/or shortened in order to provide for variation.