The Speex project aims to build an open-source, patent-free voice codec. Unlike other codecs like MP3 and Ogg Vorbis, Speex is specially designed for compressing voice at low bitrates in the 8-32 kbps/channel range. Possible applications include Voice over IP (VoIP), internet audio streaming, archiving of speech data (e.g. voice mail), and audio books. In some sense, it is meant to be complementary to the Ogg Vorbis codec. This package contains a DSP library to use with speex.