To provide an information processor and its method and program storage medium which can prevent music contents outputted from a digital output from illegally being copied.

Recording limit information which limits recording is extracted from contents and according to the extracted recording limit information, contents composed of digital data outputted from an output means for recording are converted by recording-ineffective digital data composed of the digital data, thereby effectively stopping a copyright infringing action as to contents distributed to many unspecified terminal devices through, e.g. a network.