    + ChannelMappingFamily:
                The ChannelMappingFamily field shall be set to the same value as the *Channel Mapping Family* field in
                the identification header defined in Ogg Opus [3]. Note that the value 255 may be used for an alternative
                to map channels by ISO Base Media native mapping. The details are described in 4.5.1.
            + StreamCount:
                The StreamCount field shall be set to the same value as the *Stream Count* field in the identifica