 Especially the large choruses, which exhibit a pronounced tendency to build up large soundscapes from highly individual timbres, demonstrate the composer's method of thinking in constellations of basic pitches without veritable chord syntax.Orff's renunciation of the grammar of harmonic tonality allowed the composer, as the musical equivalent of Hölderlin's archaic language, to turn the declamation of the singing voices itself into the vehicle for the dramatic action.As Pietro Massa has been able to show, an intensive exchange of ideas with the classical philologist Wolfgang Schadewaldt, the musicologist Thrasybulos Georgiades and the stage director Wieland Wagner, who had originally been selected as director for the world premieres of "Oedipus der Tyrann" and "Prometheus" by the composer, accompanied the genesis of Orff's operas on Greek drama.