Performance of Petra in the church. Her movements influence the standing waves in the space and by that the sounds change. There is a microphone on a specific spot in the church that produces feedback and through the shakers makes the long string vibrate. This whole complex of actions, reactions and corrections creates standing waves. Slowly moving objects or bodies are interactive with the system and 'disturb' it.
Performance of Petra recorded during our second workperiod at the Church of the Holy Heart in Eindhoven. Here we experimented on our WAVES project with 2 50 meters long strings interactive with each other. Petra's movements and position have some influence on the changes in the sounds.
Experimental setup where a toolbox is responsable for a double feedback system that is creating standing waves inside our studio.
This causes interactivity: moving around ourselves, or with the toolbox causes changes in the sound parameters.
Loose ends of strings are connected to tensed strings/ bodyshakers/piëzo- constructions that produce movement feedback.
The result is a continouous swinging motion, as if the string is bouncing in it's own frequency. If this is really the case we don't know, since we're no scientists but artists. And who cares anyway?
A second video of the Church WAVES. Here, the video is edited, but the sound is in one take,
and (although visually not spectacular) sonically much more interesting.
Without any human interference the system keeps itself going, with many differences in
volume, complexity and sound colours. Here the basic feedback frequency varies between
4 and 20 Hertz, and there is much space for the higher overtones.