A ubiquitous yet soon obsolete medium for publishing, storing and safeguarding data, CDs provide a means to project and divulge as well as a way to encrypt and hide. Once discarded and declassified, they are of no value. Is all free information worthless? These round shiny objects, usually treasured and protected, locked up in vaults or spinning in drives, are now spread out, let loose, exposed. Their shift from medium to material is the translation from one domain into another: from private to public, from object to assemblage, from one set of properties to the next—from what a thing does to what it is. In this new context they register other information—movements, lights, drifts—as iridescent shimmering fragments. They circulate, replay and reflect circumstances and dynamics of an environment, becoming a real-time interface, a public release.