Pop Music Is Sadder Today Than It was 50 Years Ago (Scientific American)

Popular songs have switched from major to minor keys: In the 1960s, 85 percent of the songs were written in a major key, compared with only about 40 percent of them now, a new study finds. America’s popular songs have also become slower and longer. “Broadly speaking, the sound has shifted from bright and happy to something more complicated,” Helen Lee Lin writes in Scientific American.

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