Warp Records' roots lie in a short-lived subgenre of house called Sheffield bleep, and LFO's 1991 debut LP—the third album released on the label—captures the style in all its livewire glory. Unvarnished drum machines and sampled percussion collide in spiky, herky-jerky rhythms; shivering square-wave bass, primitive computer voices and cheap synths round out the chilly, minimalist atmosphere. They're at their punchiest (and catchiest) on "LFO (Leeds Warehouse Mix)" and "We Are Back", but the whole album is a treat; dance music has rarely sounded more alien.