Internet Assigned Numbers Authority • Domains • Protocols • Numbers • About Opus Channel Mapping Families Created 2016-03-07 Last Updated 2018-11-02 Available Formats [IMG] XML [IMG] HTML [IMG] TXT Registry Included Below • Opus Channel Mapping Families Opus Channel Mapping Families Registration Procedure(s) Specification Required Expert(s) Tim Terriberry, Ralph Giles Reference [RFC 7845][RFC 8486] Available Formats [IMG] CSV Value Description Reference 0 Mono, L/R stereo [RFC 7845, Section 5.1.1.1]; [RFC 8486, Section 5] 1 1-8 channel surround [RFC 7845, Section 5.1.1.2]; [RFC 8486, Section 5] 2 Ambisonics as individual channels [RFC 8486, Section 3.1] 3 Ambisonics with demixing matrix [RFC 8486, Section 3.2] 4-239 Unassigned 240-254 Experimental use [RFC 8486, Section 6] 255 Discrete channels [RFC 7845, Section 5.1.1.3]; [RFC 8486, Section 5] Licensing Terms