Few recognized Cluster for what it was - a synthesis of pop music, stripped of embarrassing glamour, and so-called serious music without intellectual constraints. Moebius and Roedelius took the liberty of raiding both disciplines to perfect their musical concept. A common enough practice today, but akin to a palace revolution in 1971. So it is that three pieces of electronic music meander and pulsate through Cluster, with no beginning and no end. Cluster's music is free and open in all directions. There are sounds, noises, and structures to be heard on this album that would become ingrained in the electronic pop music of the 1980s and 1990s. Cluster had taken the first step into the future.