"Now and Then" — The Beatles
2023
The final Beatles song was completed using MAL, a neural network built for Peter Jackson's "Get Back", to separate John Lennon's voice and piano from a 1977 home demo. Paul McCartney: "nothing has been artificially or synthetically created. It's all real and we all play on it."
The walkQuestion 1: was any generative AI used? No — source separation is trained machine learning that invents nothing, like autofocus or denoise, and the non-generative edge case keeps it at Level 0. Read separation as processing of their own material instead and it is Level 1; either reading is defensible, and both sit strikingly below the "AI Beatles song" headlines of the time.
The binary label called this "made with AI" and made it a controversy. The scale calls it what it was: humans playing on a cleaned-up recording.