This tool is used to convert Ogg Vorbis (ogg) to MPEG-1 Audio Layer 3 (mp3).

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.

MP3 is a coding format for digital audio. Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended—defining additional bit-rates and support for more audio channels.