A long-time Sonic Acts collaborator, Marcin Pietruszewski performed at both the 2022 and 2024 Biennials. The Polish composer and researcher works with computer-based synthesis and composition, exploring the formal developments of twentieth- and twenty-first-century music and contemporary art. His practice spans composition, pluriphonic installations, and radio productions, engaging with synthetic sound, algorithmic systems, and scientific formalisms. His latest release, Normification (2025) with Florian Hecker, is out on Diagonal Records.

Lukas De Clerck, a Brussels-based artist and musician, focuses on the aulos – an ancient double-reeded pipe revived through his ongoing research and collaboration. His self-invented telescopic version of the instrument opens new possibilities for exploring microtonality, psychoacoustics, and sound texture. De Clerck performed Sarah Davachi’s composition Diptych on the aulos with Victor Guaita Igual (viola) during the Sonic Acts Biennial 2024. His music has been released on Ideologic Organ, KRAAK, blickwinkel, and Beyt Al Tapes.

During the residency from 6 to 9 November 2025, Pietruszewski and De Clerck will develop Oto Aulos, a new work to premiere during the Listening Room sound exhibition at Sonic Acts Biennial 2026. The project transforms the breath-driven character of the aulos through computational processing, extending it into synthetic and spatial domains. Drawing on psychoacoustic research into distortion product otoacoustic emissions (DPOAEs), the pluriphonic composition explores how sound perception, physiological hearing, and algorithmic interpretation interact to create volatile, spatially shifting sonic experiences. Led by Pietruszewski in collaboration with De Clerck, Oto Aulos is co-commissioned and co-produced by Sonic Acts and CTM Festival.