In a message dated 3/28/2008 12:02:11 P.M. Eastern Daylight Time, thatcher at mediaguide.com writes: There's a short historical summary here: http://tenwatts.blogspot.com/2005/07/aircheck-history-part-i.html but this site has some problems itself with dates and '1876' for Cros. I didn't see Edison's 1878 phonautograph either... did I miss that? Allen **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15&ncid=aolhom00030000000001)