Sergi Jordà holds a PhD in Computer Science and Digital Communication. He is a lecturer at the Pompeu Fabra University of Barcelona, where he teaches computer music, audio programming, HCI, and interactive media arts. Sergi discovered the magic of computer programming while completing a Bachelor of Science in Fundamental Physics in the early 1980s, and he immediately decided to give up the saxophone practice in order to become a computer music improviser. Since these early days, he has therefore pursued the complexity, delicacy and futility of real-time, multidimensional performer-instrument interaction. He has written many articles, books, given workshops and lectured though Europe, Asia and America, always trying to bridge HCI, music performance and interactive media arts. He is currently best known as one of the luthiers inventors of the reactable, a tangible interface and a new musical instrument that accomplished mass popularity after being integrated in Icelandic artist Bjork’s new world tour, and which has recently won the Ars Electronica Golden Nica for Digital Musics. As a luthier and improviser, Sergi likes to invent new digital musical instruments without forgetting to make music with them, and although his music has been released on various labels and he has composed for different instrumental setups and for films, he prefers the immediacy and volatility of free improvisation.