Main had already released various EPs and compilations of same by the time Motion Pool came out, but as a de facto debut album it served to show how quickly the band had already evolved from the afterechoes of Loop heard on their earliest releases. By this point Robert Hampson’s sense of what he termed ‘drumless space’ — the beats mostly weren’t there, but sometimes-cryptic senses of rhythm were — was well formed, and the minimal, hyperfocused arrangements on “Rail” and “Core” were even further enhanced by other near ambient low-volume tracks.