Cluster: Moebius (Hawaiian steel guitar, organ); Roedelius (cello, organ).
Progressive music, space rock, or industrial noise--unlike their contemporaries in Kraftwerk and Tangerine Dream, there's no discernible human presence lurking behind Cluster's early albums, with their open-ended and often breathtaking sweeps of arrhythmic synthesized and analog sound. The duo's pioneering music still sounds enigmatic, decades after its first release.