fre:ac

fre:ac is a free and open source audio converter that comes with
an integrated tag editor and supports various audio file formats.

Features include:

- Support for MP3, MP4/AAC, Opus, FLAC and other formats
- Integrated player and tag editor
- Support for playlists, cue sheets and chapters
- Fast, multi-threaded conversion engine
- Ability to convert to multiple formats at once
- Can verify lossless input and output files
- Support for freedb/CDDB queries and submits
- Support for using command line codecs
- User interface available in 40+ languages
- Optional command line interface

Note:

In order to access files on removable media, you need to grant access by running: snap connect freac:removable-media