This was the original Reactable multi-user electronic music instrument, arrived directly from Barcelona, Spain. This guys produced some experimental sounds and they were in tune with the main stage where Autechre were performing. Since 2009, the commercialization and further development of this instrument is carried by the company Reactable Systems.
Reactable Live Performance at Sub Mix Pro Studio – Torino
Read more about the Reactable music instrument project on mtg.upf.edu