Abstract: The invention relates to a method for real-time transmission of a data stream, in particular an audio and/or video data stream, via a network of data processing devices, especially the Internet. In said method, a user interface via which the network is accessible is used for selecting the data stream from among a plurality of data streams made available for transmission. According to the invention, the user interface is used for determining at least one device for receiving the data stream to which the data stream is specifically transmitted and from which the data stream can be transmitted to at least one device in order for the data stream to be utilized, and determining the volume to be transmitted and automatically causing the determined volume of the data stream to be transmitted. The invention further relates to a computer program product and a network of devices for real-time transmission of the data stream.