media type audio/x-ogg or application/x-ogg should be added to Apache mime.types (#125) · Issues · Xiph.Org / Ogg

media type audio/x-ogg or application/x-ogg should be added to Apache mime.types

Hi, I recommend the designers of Ogg vorbis decide on a media/mime type for
Ogg/Vorbis and submit it for inclusion to the Apache group. I suggest either

1) audio/x-ogg 
2) application/x-ogg

With the media-type available, one can then utilise Apaches mod_expires module
to generate cache-friendly headers for ogg file which speeds up serving ogg
streams to people behind ISP proxy caches

http://httpd.apache.org/docs/mod/mod_expires.html

This mechanism is explained in depth at

http://www.mnot.net/cache_docs/