Par KRZANOWSKI ANDRZEJ. In his commentary in the programme book of the 16th Festival of Contemporary Music in Wroclaw, in 1988, Andrzej Krzanowski pointed to his experimentation in the areas of timbre and architecture throughout the cycle of Reliefs. In the case of Relief IV, that experimentation concerned primarily the choice of forces: soprano, a voice with an extensive compass (b – d flat3), an…