It filled St Ann's Square in Manchester.A majestic, deep, scalp-tingling, rendition of a Philadelphia soul classic.Lou Rawls' 'You'll Never Find Another Love Like Mine' sounding refined and real rather than strangled in a karaoke bar.The voice came from a man in his 50s who then delivered equally stunning performances of classical music.He was not your average busker.People stopped, listened, and put money in a blanket he placed on the paving.