The present invention pertains to a system and corresponding method for distributed processing of packet data containing audio information. The target performance states to which the performance domains are to transition may be programmable in the PMU by software, and software may signal the PMU that a processor in the system is to enter the sleep state. The sender also provides a document 4 at that web address that comprises confirmatory information already known to the recipient. On the other hand, a preferred embodiment of the invention has an arrayed lens between the diffractive grating and the arrayed waveguide. Each of the microcapsules comprises an outer layer or shell defining a microcapsule interior, said outer layer having a permeability towards a nanoscale species which is dependent on an environmental condition to which said array is exposed.