Tetra Sonus is a series of quadraphonic listening sessions conceived in dialogue with sonically and architecturally distinct spaces around the world. Each session presents newly commissioned compositions or adapted works of historical significance, designed to resonate with the acoustic and spatial character of its setting.

Developed by VVSSL—a new Berlin-based multidisciplinary initiative—the series explores spatial sound as a practice of peace, public ritual and material artefact. Using a custom quadraphonic system designed by the VVSSL engineering team, Tetra Sonus offers a focused listening experience defined through the integration of medium, environment, and sonic thought.