Several simultaneous performers share complete control over the instrument by moving and rotating physical objects on a luminous round table surface. By moving and relating these objects, representing components of a classic modular  synthesizer, users can create complex and dynamic sonic topologies, with generators, filters and modulators, in a kind of tangible modular synthesizer or graspable flow-controlled programming language. The instrument has been successfully used by the Icelandic singer Björk as a key element during her current Volta world tour.

Martin Kaltenbrunner is a researcher who was dropped by surprise into the world of electronic music with the invention of the electronic music instrument reacTable. Together with other members of the reacTable team he has shown and performed this instrument at various international festivals such as Ars Electronica, Sonar and Transmediale. His common research interest lies in the exploration of natural forms of Human Computer Interaction with the design of  Tangible, Auditory and Mobile User Interfaces - topics which he has been teaching at various European universities. He has been developing reacTIVision, an open-source framework for the creation of multi-touch tangible user interfaces. Currently he is about to finish his Ph.D. at the Music Technology Group, Universitat Pompeu Fabra in Barcelona, Spain.