Roedelius - Tape Archive Essence 1973-1978LP version. During the legendary Forst years, Roedelius had a private workspace with a Farfisa organ, a Revox A77 tape machine, an echo device and a synthesizer which he borrowed from the Cluster studio next door now and again. Here he experimented, practiced, allowed his imagination to flow, at any hour of the day or night, whenever he was not in the studio with Dieter Moebius and or Michael Rother at work on new Cluster or Harmonia material.