Will software modules for performing arts be sustainable?

When moving from hardware device to computers on stage at the end of the 1970psilas, artists did not realize they would sometimes be unable to reperform their works twenty years later. Many of them now use software modules that face important sustainability problems. In the framework of Caspar European project, the on line service team at Ircam proposes a series of new tools to accompany the maintenance of software modules required by performers on stage.