Thanks! No rush. I know I posted a lot over the weekend.
One update: for some reason, the h2.db file shrunk to 1,266,616 KB. I didn't realize it could dynamically get that much smaller. I might have had beaTunes open when I reported the larger size.
hendrik on 18 Aug, 2018 09:02 PM
Just to comment about a couple of the other points you've raised:
Danceability: This is either reading a value set by MixedInKey, a value computed by AcousticBrainz or using the algorithm by Streich and Herrera. Of these values, I assume the MixedInKey value is actually the best.
Lyrics: beaTunes does a glorified web search. If it's not easily found on the web, beaTunes cannot import it.
Acoustic/Electric/Neither: beaTunes pays attention to a couple of sources, but depends on third party information. This is why there isn't always a value
BPM and Key: This is either imported from online resources or calculated depending on the audio portion of your files (depends on your settings). The method is not optimized for classical music, but rather for popular music.