'I'm empowering my song to go and make love with different people': Imogen Heap on how her AI twin will rewrite pop

It's a very Imogen Heap way to say hello: "I've got to show you this thing – it's going to change your life!" She beams at me, showing off a mysterious black device. The musician and technologist is an electric, eccentric presence even on video call, talking passionately and changing thoughts like a rally driver turns corners. She whirls me from her kitchen floor to her living room in her family home in Havering near London, familiar to thousands of fans (AKA Heapsters) who tune in to watch her improvise, via livestream, on a grand piano. She points to a glamorous white tent on the edge of a well-kept lawn: "That's my tent I've been sleeping in, by the way," she laughs, enjoying the surprise.