Yes, meta-data was added to my music files. Moved my music out of the Music directory, Installed Audrivana. Copied a selection of tracks to test to the Music directory. Went and selected Audio Analysis and let it do its things.
Track meta-data tags before:
Track Meta-data Tags after audio analysis:
As you can see, all the audio analysis is being written to the track. Also, a Musicbrainz ID is being loaded.
Track meta-data prior:
Track Meta-data post:
Notice the Musicbrainz ID that was added.