Convert mp3 to wav format using mpg123

Audacity that comes from Fedora's repository, by default, does not support loading and saving mp3 files.

Using mpg123 (you may need to install mpg123), mp3 files can be easily converted to wav files for further editing.

mpg123 -w music.wav music.mp3

I recommend saving your work in lossless compressed format like flac rather than mp3.