1/8 Underworld, a British electronic trio led by Karl Hyde and Rick Smith, redefined dance music in the 1990s, combining techno, house, and ambient with a punk ethos. Emerging from the ashes of their synth-pop project Freur, Underworld's reinvention crystallized with Darren Emerson joining in 1991, ushering in an era of sprawling, genre-defying compositions.