Xiaomi MI MIX 1 - No Sound 7.1.0 release and history

Bug description: No sound - No video playback
Affected version: [MK71.2-lithium-190228-HISTORY.zip] // [MK71.2-lithium-190128-RELEASE.zip]
Steps to replicate: Clean installation using oreo vendor and recommended firmware

I have tried with all firmware and vendor available (oreo vendor ) with no luck , i do not know if it is a software problem or i am missing something.

Solved the problem , due to lack of instructions , finally i managed to install 7.12.28 from XiaomiEU rom , installed Mokee and sound camera and all the stuff is working properly. Thanks for all . Please add more info for users that want to install Nougat Version , at download page.