Hi, for OnePlus 8T OS 11
all i had to do is:
Using latest build of magisk 21.3
i have installed module: Audio Modification Library
Reboot!
Then install Viper4android module in Magisk
Reboot.
Open the App build v2.7.2.1
Give ROOT access, and install driver!
Device will reboot!
Open the app, go to settings, and enable Legacy Mode!
Press the driver icon and you will see that it's working!
Enable master switch set your settings and enjoy music!
No need for ANY other things!!!
Do not uninstall things in ROM, do not put any files in android/data/
No need to switch Selinux to permissive!
Thanks to Devs, i can enjoy music with my new monster phone!