Follow these instructions to install Audacity from the Fedora repository. This version of Audacity does not use an MP3 library, and cannot process MP3 files. Third-party software repositories offer Audacity with MP3 support.
Use PackageKit or Apper to install the audacity package.
The proposed installation includes Audacity and all of the libraries that Audacity uses. Review the packages you must install, then continue to install Audacity.