The external tool used by Xena to convert audio files is Free Lossless Audio Codec (FLAC).
During compression, FLAC does not lose quality from the audio stream, unlike lossy compression formats such as MP3 and AAC.
FLAC (<http://flac.sourceforge.net>) is a free and open source software tool and file format for lossless audio data compression.
Depending on your operating system, the FLAC executable may be included with the Xena package. If so, the executable will be located within a sub-directory of the directory containing the Xena program (xena.jar). Otherwise, the executable must be installed separately.
1. From the Xena menu bar, select Tools - Plugin Preferences - Audio:
Result: The audio properties window is displayed.
2. Click Browse and navigate to the location of the FLAC executable.
3. Click Open.
4. To save the setting, click OK.
Result: Xena will now be able to convert audio into FLAC format.