speex 1.1.11.1-1ubuntu0.2 (amd64 binary) in ubuntu dapper

 Unlike other codecs like MP3 and Ogg Vorbis, Speex is specially
 designed for compressing voice at low bit-rates for applications
 such as voice over IP (VoIP). In some sense, it is meant to be
 complementary to the Ogg Vorbis codec.
 .
 This package contains the encoder and decoder command-line
 applications.