Metadata

File Systems

Dunno of any, but the CLI tools TMSU, Tocc, and Tagistant all create their own file systems (using symlinks) inside your drive's existing one that can then be accessed by other software. Pretty handy.

Software

Calibre
Digital book manager with good metadata editing tools.
EasyTAG
Gnu tool for tagging audio files. Never tried.
ExifTool
Ex Falso
MediaInfo
Musicbrainz Picard
pdftag
tinyMediaManager
VLC
Lets you edit a small set.

Tag Manager

Software that stores it's own database of tags, as a way to consistently tag all sorts of files, no matter what metadata they support. I've tried some before for organising images and videos, and am currently trying some for organising music samples and sound effects.

Baloo Homepage
KDE tool with a limited CLI sister-tool.
Hydrus Network Homepage
Channer affiliated :/
TagFlow Homepage
Roadmap talks a lot about cloud stuff…
Tagistant Homepage
CLI, TSMU seems better though.
TagSpaces Homepage
Open-source, but free version is limited :/
TMSU https://tmsu.org/
CLI tool.
Tocc Homepage
Tracker Homepage
Gnome thing

My Use

Music

I generally just use these tags:

TIT2 ／ title
TPE1 ／ artist
TALB ／ album
TPE2 ／ albumartist - Quod Libet labels this performer. Usually only use if there are multiple artists, software seems to sort stuff right otherwise.
TYER ／ date
TPOS ／ discnumber - If there are multiple.
TCON ／ genre - I have set genres I use, and I also place the country and sometimes city in here.
TRCK ／ tracknumber
COMM ／ comment - If I want to specify it's a Youtube rip or something.

Ones that seem neat that I should use:

TSST ／ discsubtitle
TLAN ／ language - Fill with three-letter language code from ISO-639-2
- List of ISO 639-2 codes
- NB: mul for multiple, zxx for none.
TSOP ／ artistsort
TSO2 ／ albumartistsort - Starting to try these two 'sort' tags now though.
TSOT ／ titlesort
TSOA ／ albumsort
Multiple ones for artist-related URLs.

Maybe notable ones I don't bother with are:

TCOM ／ composer
TSOC ／ composersortorder
MVIN ／ movementnumber
Shit like play counts and ratings. Though considering a use for ratings.

−Table of Contents