Using an archive called the Million Song Dataset, researchers in Spain reduced pop songs from 1955 to 2010 into a series of numbers which were then analysed by a supercomputer, reports Reuters.
After analysing the results, artificial intelligence expert Joan Serra concluded that recordings have become much louder over the years, while employing fewer combinations of musical notes.
Chart-fodder has also come to rely on a narrower set of instrument sounds as use of digital production increased over the years.
Serra says: "We found evidence of a progressive homogenisation of the musical discourse. We obtained indicators that the diversity of transitions between note combinations – chords plus melodies – has diminished in the last 50 years."
And the resulting study concludes that if musicians want to sound more original, they need to look back in time for inspiration and think about simpler chord progressions while using a wider range of instruments.