Kluster was a short-lived project of three musicians/artists/performers: Dieter Moebius, Hans-Joachim Roedelius and Konrad Schnitzler. With legendary producer Conny Plank they recorded two albums in 1970. These were unprecedented in their experimental radicalism. Chaotic, apocalyptic (noise) improvisations (a sound later termed industrial), enriched with recited lyrics in places. The trio split up not long afterwards. Exchanging the K for a C, Roedelius and Moebius continued as a duo under the name of Cluster, whilst Conrad Schnitzler went solo. 'Klopzeichen' was originally released in 1970. Linernotes by Asmus Tietchens.