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In tonal music, chord progressions have the function of establishing or contradicting a tonality, the technical name for what is commonly understood as the "key" of a song or piece. Chord progressions are usually expressed by Roman numerals in Classical music theory. For example, the common chord progression I–vi–ii–V.
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Answer: A set of principles dealing with the appreciation of beauty usually used in art.
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I think true. There wasn't enough info to go off of.
