If anyone has the first firmware the fiio came on or a copy of the boot img aka kernel in a backup I would take that to. We might be able to get magisk to work maybe I think its not true but im willing to try. 1.0.9 firmware has been removed from the fiio site and no one has a copy there rumours that the early kernel can be rooted with magisk but we need a copy so if anyone can help out please do thank you. If we get magisk running it would be possible to systemless get viper to work system wide. That doesnt mean it'll work with Fiio stock sound though it might just sound the same as a phone with viper because thats what it does with bluetooth but bluetooth isnt setup like headphones on the fiio the bluetooth always sound the same in my opinion. Im over the codecs they dont sound any different I havent tried LDAC though. No bs either I dont want some kid to come on here and say I got it and it worked but im not going to give you the kernel cause we know your lying and I hear that every day on XDA because if anyone did do it they would be bragging they figured it out.