FLAC is a lossless compression method for audio files. Using it, one is able to reduce the filesize and keep the same audio quality as a regular WAV file (CD quality).
The FLAC format is open source, and can be read without any problem by such applications as Amarok or Kaffeine.
This file contains two service menus: one to convert WAV files into FLAC, and one to convert FLAC files into WAV.
You will need the FLAC application to be installed on your system to use these service menus.