Researchers reconstructed Pink Floyd’s “Another Brick in the Wall, Part 1” by using the brain waves of people who listened to the song.
Except Pink Floyd didn’t perform any of the music in the clip. Instead, the track was crafted by a team of researchers at the University of California at Berkeley, who looked at the brain activity of more than two dozen people who listened to the song. That data was then decoded by a machine learning model and reconstructed into audio — marking the first time researchers have been able to re-create a song from neural signals.
How brain waves could be used to create an eerily similar version of a Pink Floyd song is a process that began in 2009 inside a hospital in Albany, N.Y. There, 29 patients who were undergoing epilepsy treatment — namely, having a net of electrodes implanted in their brains to identify the location of drug-resistant seizures — volunteered to have their brain activity recorded while “Another Brick in the Wall, Part 1” played.
The decision to use a Pink Floyd song was simple, Knight said. Every patient they were studying liked Pink Floyd, he said. And they chose “Another Brick in the Wall, Part 1” — instead of the better-known Part 2 — because it’s “a little bit richer in vocals and harmonics,” Knight added. Then, the numbers Bellier crunched were turned into music using AI — a powerful machine-learning model that took into account how the brain responded to a combination of sound frequencies. The patterns were turned into a spectrogram, or a visual representation of a sound’s frequencies and how they change over time — and then into a sound file that turned out to be closely reminiscent of the original Pink Floyd song.
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