These files are encoded in Ogg "Speex" format.   It is designed to
make human voice files, especially phone messages, very small.

Most linux systems have decoders for it, you can get plugins for
Windows, Mac and other systems at www.speex.org, particularly
    http://www.speex.org/projects.html

For MS Windows try http://www.illiminable.com/ogg/
or http://www.republika.pl/roed/speexw/
or this one: http://www.openacm.org/dl/SpeexACM_1.0.1.1.zip


For versions in Ogg Vorbis go to www.vorbis.com and
	http://www.vorbis.com/download.psp for plugins
