Seven contemporary composers were invited to write short vocal pieces for the project The Logic of Angels. The NOVA vocal ensemble recorded these pieces at the ORF studio, augmenting them with music from the 13th and14th centuries. These recordings constitute the sound material for the installation.

A sound capsule moves vertically along the 30-meter-high Keine Sorgen Tower. Visitors can hear sounds from near and far, in other words, from up above or down below. The sound capsule becomes a kind of technical pseudo-creature, a sound messenger like an “angelic being.”