After a scission of the avant-garde group "Kluster" due to the departure of Conrad Schnitzler, the two musicians Dieter Moebius and Hans Joachim Roedelius go to work in duet as "Cluster". The band's first years were clearly orientated to Krautrock and to experimental electronic music. Consequently, the production of the band started with massive, radical improvisations, constructed around electric organ works, electronic collages, guitar sound manipulations, feed back. The result is rather similar to Kluster's underground, conceptual music, very chaotic with lot of distortion and reverb. With its repetitive, hypnotic guitar patterns and embryonic electronic collages, the second album "II" can be seen as a classic in 70's German electronic underground. This high quality experimental electronic music will progressively lead the band to something far from the krautrock scene and extreme music…
In Brian Eno's first collaboration with Cluster, the best of this album's instrumental pieces are too emotionally rich to waste as mere background music, evoking feelings of hesitancy and regret that rescue the music from mere vapid prettiness. Three tracks in particular indicate things to come. "Wehrmut" is an ethereal synth piece with the pace slowed to a tantalizing crawl. "Steinsame" features a treated guitar playing a slow figure over a dark, almost funereal synth melody. "Schöne Hände" uses watery synth effects to highlight a shivery rhythm pattern. Other pieces dispense with moody atmospherics altogether. Tracks like "Ho Renomo" and "Selange" consist mainly of pounding rhythm patterns lightly embellished by piano or synthesizer, and "Die Bunge" sounds like an electronic goldfinch fluttering around a cartoon horse.