What is M4A file? We explain and show you how to edit an M4A or MPEG-4 Audio file on a Windows 11/10 PC using free software or an online tool.

Metatogger is another helpful tool for editing MP3 tags and tags of other format audio files. It lets you add Opus, Ogg Vorbis, AAC, WMA, FLAC, and MP3 format files for metadata editing.

If you just need to edit MP3s (or other audio files), you can't beat Audacity. Just make sure you install lamelib (I think it comes bundled, but isn't installed by default because of licensing ...