Something is rekindled in the grainy late-night livestreams of the Eras Tour. A fisherman wakes to sing back the dead. A girl rescues dusty vinyls from the local corner shop. A disillusioned thirtysomething finds solace in piano renditions of the Beatles. Rousing and introspective, nostalgic and exciting - from birdsong to 'Bohemian Rhapsody' - this is the sound of Undersong