In this conversation we cover a chamber music work of Katerina which is wholly aleatory and 2 choral pieces which have aleatory elements. I found fascinating the structuring of a whole piece of instrumental chamber music, Rain on a Tin Roof, on 22 small segments of music, each containing from 2 notes to 10 notes, called "cells" which the instruments repeated, or not, as they advanced from cell 1 to cell 22 and back. And then we talk about the use of syllables in choral music which have no meaning, in the work Fire, and yet which add to the effect of the work. Spend some time with us and enjoy the music!