[Toyanster]

I didnt find any more sites that I can ask this question and after about two weeks of consistently researching about my situation, I figured I ask some help from you guys. 

I have a Xiaomi Mi Box 3 Global Version which I purchased from Aliexpress in 2018. 
It was on Android Oreo 8.1 but I updated it to Android Pie 9.0 recently this year. 
I have been using my trusted headphone by Meizu. Model is Meizu HD50 which I bought in 2016. it has served me well. 
I am now looking to buy a new headphone to use as I watch Movies from time to time at home. 
I recently found a 7.1 Xiaomi Gaming headphone which I am inclined to buy but just before I proceed with the purchase I would like to ask for some advice and opinion from others whether it is a good call to purchase it for movie purposes. 
From what I gathered from my previous research is that the headphone must be plugged to a computer to use the 7.1 paired with the xiaomi software for PC to use the 7.1.
Im thinking could I connect the headphone directly to the xiaomi mi box USB port and watch 7.1 / 5.1 videos and have the passthrough feature of the KODI player?

Regarding the Kodi, I found from my searches that since the Android pie update, kodi lost the passthrough support. Is this true?
To anyone who has experience regarding my situation please share your opinions. 
Xiaomi Mi box 3 Global Version on Android 9 ---> Xiaomi Gaming Headphone 7.1 plugged to the USB hub connected to the Mi Box --> play videos with 5.1/7.1 Audio using Kodi Player with Passthrough enabled = raw 7.1 Sound from video??

Any response will be appreciated as I am aiming for Xiaomi Gaming Headphone 7.1 if audio works 
if not, I will go for Meizu HD60 which is Hi-Res audio and bluetooth ready with Aptx support. 

Thank you