Dr. Martin Kaltenbrunner (*1972) is professor for Tangible Interaction Design, head of the Tangible Music Lab and director of the Postdigital Lutherie master program at the Institute of Media within the University of Arts Linz.

Before his return to Austria he worked as researcher and lecturer at the Pompeu Fabra University in Barcelona as well as further European institutions, such as the MIT Medialab Europe in Dublin. As co-founder of Reactable Systems he had been mainly working on the interaction design concepts behind the electronic musical instrument Reactable, which was awarded with a Golden Nica for Digital Music at the Prix Ars Electronica 2008. This instrument provided the framework for his present artistic-research practice, which is applying tangible interaction design methods towards postdigital lutherie.

He received a Doctorate in Engineering from the Bauhaus-University Weimar, and his technical developments in the field of Tangible User Interfaces have been employed for the realization of numerous artistic and scientific projects.