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Scrape Album Metadata
In Phase 8, missing album metadata was scraped. Phase 9 identifies album artists that have not been scraped before, evaluates them, and scrapes their metadata.
The bracketed numbers just below the diagram title are line numbers in Kodi's music scanning code (MusicInfoScanner.cpp) found at https://github.com/xbmc/xbmc/blob/Leia/xbmc/music/infoscanner/MusicInfoScanner.cpp
Next up is Phase 10: Scrape Song Artists