Vorbis sends the entropy tables in the actual file at the start. https://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-470003 https://www.xiph.org/vorbis/doc/V

Vorbis sends the entropy tables in the actual file at the start. https://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-470003 https://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-470003 If you have the complete file you can calculate the optimal ones. In a streaming scenario that does not work and you have use something you think is good.