To grasp operation states of respective bodies which are viewed from the whole execution area with output sounds from a plurality of speakers when body images in operation areas which are displayed at respective monitor parts of a plurality of information processors are moving in an execution area of common software.

Various information regarding a body image displayed at a monitor part 13 of an information processor 10 is analyzed and sent as image analytic information to an automatic sound source environment restoring device 30. An image information restoration part 33 of the automatic sound source environment restoring device 30 integrates pieces of audio information included in pieces of image analytic information sent from the plurality of information processors 10 to restore a sound signal based upon the position relation between a body etc., that body position information indicates and a reference point of an audible space, and the restored sound signal is sent to a plurality of speakers 20 to output restored sounds.