The limitedness, which every human being experiences daily, necessarily pre-supposes the existence of an unlimited.The ancient philosophers described it as the form-triggering principle - because forms exist only through limits: the unlimited - or Greek 'Apeiron' - thus causes the change of form, through which life alone is possible. By dealing with border phenomena, by investigating the transformation of one sound into another or into silence or out of silence into sound, by moving the sounds in space, Gerald Eckert's music touches on such existential experiences. But it does not dwell on the anecdotal - in other words, the music does not develop from everyday experiences, images or literary models. All this can be added in the course of the work: But the origin is always the purely musical conception - of a form, a structure, a sonority.