I am a researcher at the Music Technology Group in Barcelona, Spain. Currently I am mainly working on the reacTable - a novel electronic music instrument and on reacTIVision, an open source multi-touch fiducial tracking framework.
Together with Ross Bencina, Enrico Costanza and Till Bovermann I developed the TUIO protocol, which now has been widely adopted for multi-touch applications. I am the author of most of the TUIO toolkit including the Simulator and most client implementations.