Library Scan: Looks for new files that didn’t exist during the last scan. Also looks for modified files since last scan. If modified, checks to see if the name was changed in order to refer to the new filename.
- For new files, will attempt to match song filename (based on folder name) against online databases (MusicBrainz?). If that fails, or local metadata is preferred, will examine and pull metadata instead of from online database. Only performs this operation ONCE for “new” files.
Refresh Metadata: For existing files, will check MusicBrainz database for updated info on filenames, authors, release date, etc (metadata). Doesn’t APPEAR to ever look at local again at this point (seems wrong that it doesn’t).
Analyze: Check file technical data, such as bitrate, length, format, etc. Used more often for movies, I think.
The Plex Dance is currently needed the most because the important information in the metadata is only ever pulled on new file discovery. A Plex dance button that FORCES this to happen again, would be great.
