Speex

• Audio ID: 0xA109
• Company: Xiph
• Website: http://speex.org
• Documentation: http://speex.org/docs/
• Samples: http://samples.mplayerhq.hu/A-codecs/speex/

Speex is an open audio compression format designed for speech that claims to be patent-free. It is available under the Xiph variant of the BSD license.