If this albums predecessor "Fragen" (released in spring 2011) ventured into strange, unworldly musical territory, then "Rufen" pushes the boundaries still further. Qluster take the listener along a path which seems to disappear on an imaginary horizon. Roedelius and Bock neither drift off course, nor do they lose sight of their destination. Shunning computers and discarding digital sound Roedelius and Bock appear to have detached themselves from their own age, exclusively playing analogue keyboards, such as the good old Korg MS 20 synthesizer. Nevertheless, they do not revert to earlier periods in search of their stylistic approach. Conventional rhythmic and harmonic patterns are wholly absent. Qlusters foreign sounds and lucidity bring their music closer to contemporary electronic chamber music; although, as paradoxical as it may sound, a form of chamber music which Qluster first had to invent.