musicbrainz/picard — pull request #328 by Sophist-UK (2014-05-12 11:08:33+00:00)
Title: Improve clustering using directory structure if no existing album tags

These guessed values are only used for grouping and for cluster title / artist and are not added to file tags.

I plan to adjust Lookup (once this is merged and we have some feedback) to use the cluster title / artist in the search criteria if not present in the file tags.