That's quite a bit different from something "AI-generated". Still a bit ghoulish, but nowhere near as bad as using AI to fake Lennon's voice and/or Harrison's guitar.They used technology to extract a up until now impossible to extact but genuine vocal track of John Lennon's, added it to a guitar track that Harrison had already recorded, and got McCartney and Starr to record new parts. No bit of that was "ai-generated". It would be akin to scanning in illegible notes that Gygax left behind and using "AI" powered OCR to extract the text and publish that.