There are two plugins to store mp3 or videos in calibre:
1. Read MP3 AudioBook Metadata
With this plugin you can add mp3 files (and mp4 files) to calibre and the metadata (tags) are read from the mp3 / mp4 files and stored in calibre.
2. Media File Importer
https://www.mobileread.com/forums/sho...d.php?t=277104