Dies irae (Auschwitz Oratorio); Polymorphia; De natura sonoris

Sonorism is a post–World War II Polish avant‑garde current that makes sound color, texture, and unconventional timbral combinations the primary musical material. Rather than developing melodies and harmonies in a traditional sense, sonorist works organize music into blocks or masses of sound that transform through color, density, and register. Emerging within the “Polish School” of the late 1950s and 1960s, sonorism embraces extended instrumental techniques, novel orchestration, and experimental notations. Its aesthetics foreground glissandi, clusters, aleatoric layers, and dramatic contrasts to create visceral, often eerie or cathartic soundscapes that challenged serial orthodoxy and expanded orchestral imagination.