By Nick Krewen Hamilton Spectator, July 1, 1990 TORONTO – Ever wonder what happened to the group that recorded “Doot-Doot” five years ago, the silly alternative pop hit that grooved with a whirrr? They’re back, but under a different guise. Karl Hyde, Rick Smith, Alfie Thomas and Bryn Burrows used to be the minimalist pop band Freur, but they’ve resurfaced as Underworld. With a new album called Underneath The Radar, keyboardist…