Each print is a chamber music piece that was coposed in 1959. According to the editor, "these pieces are intended to evoke immediate and spontaneous interpretation by the players. There is no precise explanation of markings, a given marking is self-explanatory, or is explained by virtue of its 'magic' origin. The degree of paralelismthat can be attained between signs and their acoustic realization will create the occult attraction of every imaginative realization process. -- Source of annotation: Marvin or Ruth Sackner.