Abstract: A presentation system has a presentation controller and a play back system for presenting multiple digital presentation blocks of content to multiple audiences simultaneously. The blocks are presented through multiple channels that are selectable by the audience. The blocks are presented through presentation contrivances such as headsets or speakers. The playback system may have a wireless transmission system such that the content in the blocks is transmitted wirelessly to the location of the audience. The channels of the playback system are addressable by the presentation controller. The presentation controller has a number of device definitions and pools of play list items, each play list items specifies one or more of the digital presentation blocks. Each device definition defines a group of one or more channels and defines a pool of play list items for playing to the defined group. The presentation controller is able to redefine the pool of a device definition.

Abstract: The present invention comprises of a computer and multi-channel wireless rf transmission system for transmitting audio information to a large area audience. The system includes digitally sampled audio presentations recorded in many varied and different languages that are stored in memory locations and recalled by the main computer program for broadcasting. Each individual language is assigned to a separate audio channel. A multi-channel multiplexer is interfaced with the computer to direct each of the individual audio channels to a transmitter. Each transmitter is assigned a specific frequency or time signature for transmission of the audio signal over an antenna. A multi-channel receiver can be tuned to the frequency or time signature of the transmitter to receive any of the transmitted audio signals.