Paul McCartney's announcement that a "final" Beatles song, slated for release later this year, had been engineered with the help of artificial intelligence has sparked animated discussions amongst tourists, tour guides and music experts in the band's birth city of Liverpool. McCartney said in an interview that AI had been used to "extricate" the voice of Beatles member John Lennon, who was shot dead in 1980, from an old demo to complete a song that had been waiting in the wings for decades. The announcement comes amid concerns over the growth in popularity of AI-generated music, with believable fakes of artists like Drake, Kanye West and Michael Jackson spreading on social media. IMAGES AND SOUNDBITES