Graphical audio file tagger & renamer for Linux?

Question

What's a good utility for tagging and renaming audio files (m4a, mp3, aac etc.), on Linux, using a GUI?

Requirements:

• Libre
• Gratis
• Supports at least a bit of automation (e.g. renaming using a filename pattern)

Desired features:

• Small
• Loads quickly
• Doesn't have a lot of dependencies (e.g. won't drag half of GNOME or KDE)

Answer 1

EasyTag

Website: https://wiki.gnome.org/Apps/EasyTAG

Basic features:

• Written in C using GTK 3, part of the GNOME project
• Source: Open source, see website or the Gitlab
• License: GNU GPL v2
• Supported audio formats: MP3, MP2, MP4/AAC, FLAC, Ogg Opus, Ogg Speex, Ogg Vorbis, MusePack, Monkey's Audio, and WavPack
• Platforms: GNU/Linux, MS Windows

Some automation features:

• Autocomplete
• Scan and add data automatically from databases like FreeDB and GnuDB.
• Auto tagging by fields using masks/templates
• Rename files and directories using file tags, using masks
• Field processing (uppercasing, lowercasing etc.)
• Action undo capability

etc.