Paul McCartney told BBC Radio Four's "Today" program that artificial intelligence has been used to help create a new track featuring all four Beatles.
McCartney didn't reveal he song's name, but it's likely John Lennon's "Now and Then," which Paul, George Harrison and Ringo Starr attempted to complete for inclusion on the Beatles "Anthology" but abandoned due to the poor quality Lennon's original demo, from which they tried to include his voice, as they did with "Free as a Bird" and "Real Love."
Paul said, the technology used for the new recording was accomplished in the same way Peter Jackson's was able to extract dialogued and musical performances from murky recordings for 'The Beatles Get Back' documentary.
"So when we came to to make what will be the last Beatles' record, it was a demo that John had [and] we were able to take John's voice and get it pure through this AI.
"Then we can mix the record, as you would normally do. So it gives you some sort of leeway."
However, the musician admitted that other applications of AI gave him cause for concern.
"I'm not on the internet that much [but] people will say to me, 'Oh, yeah, there's a track where John's singing one of my songs', and it's just AI, you know?
"It's kind of scary but exciting, because it's the future. We'll just have to see where that leads."