The excellent pianist, Máté Pozsár is recognized mostly as one of the inevitable figures on the Hungarian creative music scene, being member of different groups by István Grencsó, Szilárd Mezei, István Baló or Péter Ajtai. However, being himself not just a fan but even professor in music theory, he has been developing since a couple of years a conceptual compositional method which is based on harmonies and voices inherent in the modal and the polymodal harmonics. He invites to the Opus the third time his close musical friends, to join him in his drumless sextet and realize his slowly building, transparent chamber music, exuberant both in binding terms and in free improvisation.