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Vorbis is a free software / open source project headed by the Xiph.Org Foundation (formerly Xiphophorus company). The project produces an audio format specification and software implementation (codec) for lossy audio compression. Vorbis is most commonly used in conjunction with the Ogg container format[7] and it is therefore often referred to as Ogg Vorbis.

Vorbis is a continuation of audio compression development started in 1993 by Chris Montgomery.[8][9] Intensive development began following a September 1998 letter from the Fraunhofer Society announcing plans to charge licensing fees for the MP3 audio format.[10][11] Vorbis project started as part of the Xiphophorus company's Ogg project (also known as OggSquish multimedia project).[12][13] Chris Montgomery began work on the project and was assisted by a growing number of other developers. They continued refining the source code until the Vorbis file format was frozen for 1.0 in May 2000[1][2][14] and a stable version (1.0) of the reference software was released on July 19, 2002.[15][16][17]

The Xiph.Org Foundation maintains a reference implementation, libvorbis, the latest official version of which is 1.3.2, released on November 1, 2010.[4] There are also some fine-tuned forks, most notably aoTuV, that offer better audio quality, particularly at low bitrates. These improvements are periodically merged back into the reference codebase.


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