I don't know whether the answer to my question is known or yet, from browsing the net I can't find any clarification on it. All I'm wondering is do songs that have been uploaded by iTunes Match get subsequently matched, or will they remain forever at the Upload state. What prompted me to ask is I've got a library of around 7000 songs, and 1000 of these have been uploaded. When checking which songs these are, a large number of them are available on the iTunes store, so I'd imagine that they're matchable. Many of these would be upgradable if matched, so if they matched I'd be able to upgrade them. As they're uploaded, they obviously aren't upgradable. I've run Update iTunes Match from the Store menu, but my number of uploaded songs remains the same. All I'm wondering is, when iTunes Match is updated, does it scan my whole library again and check anything that isn't matched, or just anything new in my library?