Abstract: There is a provided a method and apparatus for enabling a user to amend an audio file, via a user interface for controlling a driver for re-authoring the audio file. The method comprises the following steps: a) associating an icon on said user interface with one or more instruments or sets of instruments in said audio file; b) providing a selection of possible trajectories for each said icon, each trajectory defining the virtual path, relative to said user, of the associated instrument or set of instruments; c) providing a display on said user interface for showing the position of each said icon, each position defining the virtual position, relative to said user, of the associated instrument or set of instruments; d) the user selecting an icon; e) the user assigning a position and/or a trajectory from the selection, to the selected icon; and g) indicating, on said display, the position of the selected icon and whether a trajectory has been assigned to the selected icon.

Abstract: There is provided a communication system including a plurality of content receiver cum transmitter devices connected to a network, each device being for receiving content, selectively storing content and for selectively re-transmitting content. The system may include at least one server for storage of advertisements and transmission of advertisements either directly to the plurality of content receiver cum transmitter devices, or the transmission of advertisements being directed by at least one chaincast manager, the at least one server for storage of advertisements and transmission of advertisements being either online or offline. There may also be at least one content server connected to the network for storage of content and transmission of content either directly to the plurality of content receiver cum transmitter devices, or the transmission of content being directed by at least one chaincast manager.