Cluster (Dieter Moebius, Hans-Joachim Roedelius) are considered pioneers of electronic music and key Krautrock protagonists. In the late 1960s, together with Konrad Schnitzler as the trio Kluster, they changed the world of music for ever with their radical improvisat-ions. Having split from Schnitzler, Moebius and Roedelius continued as Cluster, releasing eight further milestones of electronic and ambient music up until 1981, two of them with Brian Eno. A hiatus lasting almost a decade was brought to an end in 1990 when Cluster made a surprise comeback with "Apropos Cluster". Liner notes by Asmus Tietchens. Originally released 1990 on Curious Music.