16. The system of claim 15 , wherein the harmonic content predicate specifies a first threshold, and the classification data processing component is operable to associate ones of the candidate harmonic segments having harmonic content levels that meet the first threshold with respective classification records comprising the assignment to the harmonic segment class.
16. The system of claim 15 , wherein the harmonic content predicate specifies a first threshold, and the classification data processing component is operable to associate ones of the candidate harmonic segments having harmonic content levels that meet the first threshold with respective classification records comprising the assignment to the harmonic segment class. 17. The system of claim 16 , wherein the harmonic content predicate additionally specifies a second threshold, and the classification data processing component is operable to associate ones of the candidate harmonic segments having harmonic content levels between the first and second thresholds with respective classification records comprising a confidence score indicative of harmonic content levels in the associated segments of the audio signal.