This tool is used to convert Windows Media Audio (wma) to Ogg Vorbis (ogg).

Windows Media Audio is a series of audio codecs and their corresponding audio coding formats developed by Microsoft.

Ogg is a free, open container format maintained by the Xiph.Org Foundation. The creators of the Ogg format claim that it is unrestricted by software patents and is designed to provide for efficient streaming and manipulation of high-quality digital multimedia.