20130188067 | CONTROLLING CONTROLLABLE DEVICE DURING PERFORMANCE - The at least one node and a trackable tag perform communication with each other. The tag is associated with a person belonging to a performance. A place of each controllable device is known. The controller receives position data of the trackable tag and controls at least one controllable device to direct with respect to the tag on the basis of the position data and the place of the at least one controllable device for causing an audio and/or optical operation associated with the performance to take place by the at least one controllable device. | 07-25-2013 |