martin kaltenbrunner and marcos alonso playing in Karlsruhe. (at the ZKM Kubus) The reactable, is a state-of-the-art multi-user electro-acoustic music instrument with a tabletop tangible user interface. Several simultaneous performers share complete control over the instrument by moving physical artefacts on the table surface and constructing different audio topologies in a kind of tangible modular synthesizer or graspable flow-controlled programming language http://mtg.upf.edu/reactable/
