Abstract: The present invention relates to a method and device for communicating data to devices which have been brought randomly together, e.g. user equipment provided to a plurality of persons grouped within a geographical area, e.g. an audience or spectators, for example as used in concerts or sports events, in particular for example such that the user equipment effectively forms part of a light emitting display device.

Abstract: The present invention relates to a method and device for providing auditory or visual effects by means of a plurality of audio or light controlling devices (200) grouped within a geographical area. The method comprises determining the position of each of the audio or light controlling devices (200) before communicating data thereto, and after communicating such data, the audio or light controlling devices (200) playing, showing or displaying at least part of such data, the part shown or displayed being based on the determined position of the audio or light controlling devices (200).