(RFC 5334 published September 2008, subtype last updated 2016-03-07) Type name: audio Subtype name: ogg Required parameters: none Optional parameters: codecs, whose syntax is defined in RFC 4281. See section 4 of RFC 5334 for a list of allowed values. Encoding considerations: See section 6 of RFC 5334. Security considerations: See section 7 of RFC 5334. Interoperability considerations: None, as noted in section 8 of RFC 5334. Published specification: RFC 3533 Applications which use this media type: Multimedia applications, including embedded, streaming, and conferencing tools. Additional information: Magic number(s): The first four bytes, 0x4f 0x67 0x67 0x53, correspond to the string "OggS". File extension(s): .oga, .ogg, .spx, .opus Macintosh File Type Code(s): OggA Person & Email address to contact for further information: See "Authors' Addresses" section. Intended usage: COMMON Restrictions on usage: The type "audio/ogg" SHOULD be used when the Ogg bitstream predominantly contains audio data. Content served under the "audio/ogg" type SHOULD have an Ogg Skeleton logical bitstream when using the default .oga file extension. The .ogg and .spx file extensions indicate a specialization that requires no Skeleton due to backward compatibility concerns with existing implementations. In particular, .ogg is used for Ogg files that contain only a Vorbis bitstream, while .spx is used for Ogg files that contain only a Speex bitstream. Author: See "Authors' Addresses" section. Change controller: The Xiph.Org Foundation.