8. An apparatus for producing supplemental information for audio signature data, the apparatus including: a processor to: obtain 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; obtain 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 memory to store the audio signature data of the first time period in association with a second time period when the processor determines that second semantic audio signature data for the second time period substantially matches the first semantic audio signature data for the first time period.
11. The apparatus of claim 8 , wherein the measure of generalized information representing characteristics of the media includes a pitch feature having at least one of an amplitude of prominent peaks in a pitch histogram, or a period of peaks in the pitch histogram, where the pitch histogram is on a full semitone scale or an octave independent scale.