The Orb virtually invented the electronic genre known as ambient house, resurrecting slower, more soulful rhythms and providing a soundtrack for early-morning ravers once the clubs closed their doors. Frontman Dr. Alex Paterson's formula was quite simple: he slowed down the rhythms of classic Chicago house and added synth work and effects inspired by 1970s ambient pioneers Brian Eno and Tangerine Dream. To make the whole a bit more listenable -- as opposed to danceable -- obscure vocal samples were looped, usually providing a theme for tracks that lacked singing. The Orb's Adv...