The percusion sounds come from processing explosive vowels b, p, d, t, g, k, tremolo from repetitiv vowel rrrrrrr, a.s.o. Exploating of Psalmus experiences one could perceive in Pendereckis' vocal compositions. Unfortunately this interesting idea, that we can discover in music of Luciano Berio as well, doesn't find its full continuation in later works from Experimental Studio. Some echoes one could meet in 'Solitaire' by Arne Nordheim, some pieces of Eugeniusz Rudnik and 'Antiphonae' by Wlodzimierz Kotozski from 1989. Interesting treating of human voice brings radio opera 'Monodrama' by Boguslaw Schaeffer from 1968.
Composer creates complex texture from the voice of actress, interpreted in various ways.
Human voice and speech is often used by Eugeniusz Rudnik, especially in his collage like works. He uses often full sentences or words, but by means of editing, repetition and knocking spoken sounds against other sound events, he creates new qualities. Rudnik uses this collage technique very often till now. Important position among all works of the Studio belongs to the electronic 'Symphony' by Boguslaw Schaeffer from 1966. It is probably the first such experiment in electroacoustic music.