In this thread, on worst performers, there’s a link to a Wikpedia entry that, in turn, links to a file with an “ogg” suffix (or whatever you call the letters after the dot).
How do I open this ‘ogg’ file? (I’m using XP with Internet Explorer)
According to this site, the OGG file extension can be one of three types: a compressed WAV file; a graphic file; or a game file. http://filext.com/alphalist.php?extstart=^O