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The Speex project is an attempt to create a free software speech coder, unencumbered by patent restrictions. Speex is licensed under the BSD License and is part of the foundation (like Vorbis).

Although not a formal part of the Ogg multimedia project, the Speex coder uses the Ogg bitstream format, and the Speex designers see their project as complementary to the Vorbis general-purpose audio compression project.

In their FAQ, the Ogg project recommends that applications designers looking for a general-purpose speech coder should consider Speex.

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