Reactable_demo_2
<a href="http://mtg.upf.edu/reactable/">http://mtg.upf.edu/reactable/</a> <br />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.