The present invention provides an information-
processing apparatus for communicating with an other information-
processing apparatus, which is connected to the information-
processing apparatus through a network. The apparatus includes
reproduction means for synchronously reproducing content data common to the other apparatus, user-information
receiver means for receiving a voice and image of an other user from the other apparatus, synthesis means for synthesizing a voice and image of the content data synchronously reproduced by the
reproduction means with a voice and image received by the user-information
receiver means as the voice and image of the other user, characteristic analysis means for analyzing at least one of a voice of the content synchronously reproduced by the
reproduction means, an image of the content data, and auxiliary information added to the content data in order to recognize a characteristic of the content data, and parameter-setting means for setting a control parameter to be used for controlling a process, which is carried out by the synthesis means to synthesize voices and images, on the basis of an analysis result produced by the characteristic analysis means.