Being new here, maybe this is a stupid issue:
I edited carefully the tags, album titles, interpretes, writer etc. in this marvelous tool MP3Tag. After that I downloaded the entire Music directory to my Fairphone.
I opened "USB Audio Player", deleted the database and let it re-scan the entire music directory.
Alas, after that new Album titles didn´t show up, but some titles I never ever had created. Neither with MP3Tag nor before.
The same result with GoogleMusic.
Didn´t make a difference whether it were FLAC or MP3 format.
Any idea how I can make my wonderful created tags available for an Android player?