Source: http://web.archive.org/web/19990128033356/http://www.users.fast.net/%7Erodsmith/sound.html
http://web.archive.org/web/19990427232342/http://www.channel1.com:80/users/rodsmith/sound.html
http://web.archive.org/web/20000919135517/http://www.rodsbooks.com/sound/