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Music uses, and sometimes may require, the use of repetition. Repetition, from my perspective, is the expression of the same idea multiple times that establishes symmetry throughout the piece. According to Ratcliff, repetition is a subtle "change moving against a constant," in which repetition requires slight changes to a nearly identical rhythm, timbre, instrumentation, or any other musical element, in order to successfully emphasize the purpose of the repetition (Ratcliff 14). Although I do agree that repetition promotes a physical response to music, and that repetition is essential in adding to the length of a piece, I feel like repetition should not consume the musical piece. Tasteful repetition, in my opinion, includes different musical sounds with a similar theme, in order to promote an underlying theme. In order to create a meaningful song, in my opinion, repetition needs to be limited and contrasting, so that the artist may  discover or create a new musical thought-- in turn evolving music into a newer and refined era.

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"Everything we tend to classify as 'variation'... includes repetition."

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"Everything we tend to classify as 'variation'... includes repetition."

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-- Ratcliff in Every Song Ever (14)

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The song is a disco song, and therefore requires a sense of "dance-ability" in order to keep the audience interested and groovy. Therefore, the various instruments require unique-yet-similar rhythms in order to not bore the audience while still using repetition to help them understand the piece. The poly-rhythmic sound and syncopation allows for a unique variation without destroying the fragile rhythmic response of the audience.

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"Repetition is a smart psychological operation-- a way to make you focus on all that is in face nonrepetitive."

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"Repetition is a smart psychological operation-- a way to make you focus on all that is in face nonrepetitive."

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-- Ratcliff in Every Song Ever (14)

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Music, particularly contemporary pieces created by the "common-people," or people with little to no formal musical education, use repetition in order to emphasize certain ideas, and to keep the audience from being confused by the message of the song. For example, Neutral Milk Hotels Oh Comely uses a simple and repetitive track in order to emphasize the lyrics-- and the subtle changes in the instrumentation expresses the changes in emotions amongst the musicians. This exemplifies the use of both repetition and variation in order to enhance the meaning of the song.