Method and software product for transferring data, plus equipment for controlling data transfer in a multimedia system that includes a group of participants' terminals, with which multimedia data generated by participants' terminals contained in the group are sent to one or more participants' terminals contained in the group and played back there. A central synchronization unit generates synchronization labels containing time information and sends them to the participants' terminals contained in the group, and the synchronization labels are used to play back information in modified time.
