The first masterpiece by the band where the compositional but mainly playing abilities by the band flourish. For the fans of dynamic instrumental progressive rock, this is the album by Modry Efekt/Blue Effect to listen to. Guitar is dominating, more than it would be on the consequent albums. You can hear influences by Focus/Finch, King Crimson, slightly perhaps Yes.

Led by guitarist and composer Radim Hladík formed in autumn 1968 were one of the major progressive bands in Czechoslovakia