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Polyphony began and musical rules changed
The tritone is argued as a musical interval composed of three adjacent whole tones. It is often defined as an interval spanning six semitones. it led to the disregard of traditional tonality.
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Hoovervilles, or shantytowns, became a common sight. The nickname 'Hooverville' was given to the shanty towns that sprang up across the nation during the Great Depression
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