From subtle overtones on the edge of the perceptual threshold to loud, powerfully radiant overtones with the technique of "polyphonic overtone singing", it is possible to create 8-part sounds with four singers. They sing improvised sequences and composed works in different positions in the church space, each producing a different sound result. In this way, the interaction between vocal sound and architecture can be experienced acoustically in a very impressive way.

Overtone singing/voice: Ines Abt, Timber A. Hemprich, Mechthild Hettich, Jens Ickert