To construct an AV system giving the feeling of presence by providing biological information.

PCM audio data are recorded in a first session P1 which is a first area at an inner circumferential side of an optical disk Ma, and the biological information is recorded in a second session P2 which is a second area at an outer circumferential side. The biological information is biological information of a player, performers, an audience, or the like. The AV information and the biological information recorded on the optical disk are temporally synchronized. The PCM audio data and the biological information are reproduced from the respective sessions. The tempo, level, etc., of the reproduced PCM audio signal is controlled by the biological information. This enables a listener of the controlled PCM audio signal to feel a live punch.