Workflow to manage library

[the_bertrum]

The short answer is, yes you need to manage the tags, including images outside of moOde then rebuild your library afterwards.

Longer answer, my workflow looks like this:

1. Understand how moOde uses tags and set up the preferences to control how your tags are used (album art preferences, what metadata to show, sort orders and so on).
   
2. Use a good tagging program to analyse your current tags, add in any missing tags, correct any inaccuracies, and remove any duplicate, invalid or unnecessary tags.
   
3. Rebuild your music database in moOde, clear the tag cache, and all your browser caches.
   
4. Apply your tag hygiene to any new files before scanning for them.
   

As to what is a good tagging program, well there's a heap of advise in other threads on this topic.  I find that there isn't just one, you'll probably need to combine two or three different tools to be sure you've not missed any hidden tags, or tags that are in the wrong schema for the file, or any number of other nasty stuff that lesser music players either introduce to your files, or ignore, or both.  I find that Musicbrainz Picard is pretty good as a starting point if you like using their database to provide the values for the metadata and you can ask it to remove any tag that isn't in its database which does a good job at killing all the duplicate or invalid tags that can get into files from time to time.