Composite materials having a multi-wall carbon nanotube content of from 4 to 15% by weight, based on total weight of the composite, are produced from a dispersion of multi-wall carbon nanotubes and a fiber reinforcing material in a carrier fluid which is processed to form a shaped article that may then be infused with a liquid polymer or polymer-forming mixture to form the composite. A plurality of media items are identified. An example platform may be designed from function blocks from a function block engine. The audio stream and the corresponding position information are sent to a terminal.