14. The method of claim 13 , wherein the tracking mode includes resolving the single current audio item from among the multiple candidate audio items.
13. A method of managing resources in a server to continuously monitor an audio signal and identify audio items within the audio signal, the method including: receiving into a local cache on the server predictive audio fingerprints and corresponding audio item identifiers appropriate to a tracking mode; wherein the tracking mode includes a known or suspected alignment of at least one fingerprint extracted from the audio signal with at least one reference fingerprint, and the predictive audio fingerprints for the tracking mode are sequences of fingerprints relative to the known or suspected alignment that represent multiple candidate audio items for a single current audio item.