A research team looked at more than 17,000 songs from the US Billboard Hot 100 and found three music revolutions - in 1964, 1983, and 1991.
The researchers looked at the different characteristics of music, including harmony, chords changes, and timbres, then analyzed how they changed over time.
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As 2020 settles, we look at the eclectic, vibrant music trends in the last decade, when the music turned truly global, glossy and digital, and when the iPod generation turned to stream endless playlists on their smartphones.
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