In a reproduction environment, speakers are grouped in directional groups, wherein the directional groups overlap with respect to the associated speakers so that speakers are present which have a speaker parameter having different values for the first directional group and the second directional group. The shroud is open at inlet and discharge ends for drawing in and discharging fluid from the tank. The locus curve of each marker in three-dimensional space is then determined in dependence on the time and it is stored as a data set. Also disclosed is a method for creating patterns of light across a user’s hair. Receive chains associated with unused receive antennas are deactivated to reduce power consumption within the device. Also, audio andor video bridging of the endpoints and the MVCT is enabled by the AVBM and the determined endpoint based on connectivity information of the remaining endpoints with the MVCT and the determined endpoint for conferencing participants.