Much like the early Orb-related project recorded as Space, Adventures Beyond the Ultraworld simulates a journey through the outer realms -- progressing from the soaring ambient-pop of "Little Fluffy Clouds" and the stoned "Back Side of the Moon" (a veiled Pink Floyd reference) to "Into the Fourth Dimension" and ending (after more than two hours) with the glorious live mix of "A Huge Ever Growing Pulsating Brain." A varied cast of samples (Flash Gordon, space broadcasts, foreign-language whispers) and warm synthesizer tones provide a convincing bed for the midtempo house beats and occasionally dub-inflected ambience. With a clever balance of BBC Radiophonics Workshop soundtracks, '70s ambient meister-works by Eno, Hillage, and Floyd, plus the steady influence of Larry Heard's sublime Chicago house, Adventures Beyond the Ultraworld is the album that defined the ambient house movement.