1. A processor-based method for producing supplemental information for audio signature data, the method comprising: obtaining, by executing instructions with a processor, the audio signature data of a first time period, the audio signature data including data relating to at least one of time or frequency components representing a first characteristic of media; obtaining, by executing instructions with the processor, first semantic audio signature data for the first time period, the first semantic audio signature data being a measure of generalized information representing characteristics of the media; and storing, in a memory, the audio signature data of the first time period in association with a second time period when the processor determines, by executing instructions with the processor, that second semantic audio signature data for the second time period substantially matches the first semantic audio signature data for the first time period.