Download this
http://www.k-foren.de/attachment.php?s=acc8445e7ef46b8d337ed08e87a832e3&postid=193534And use these instructions :
USAGE INSTRUCTIONS
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1. Extract the WSSDEC.EXE and WSSCOD.EXE to a work directory.
2. Copy the WSS file to be decoded to WAV format or the WAV file to be
encoded to WSS format into the same work directory as above.
3. Open an MS-DOS window.
4. To decode a WSS file, issue the following command:
WSSDEC file_name.WSS (replace "file_name" with the actual name of
the WSS file you are decoding)
This will create an output file with the same name but with an
extension name of WAV.
5. Similarly, to encode a WAV file, issue the following command:
WSSCOD file_name.WAV (replace "file_name" with the actual name of
the WAV file you are encoding)
This will create an output file with the same name but with an
extension name of WSS.