AudioTuner apk needed for OxygenOS 2.0.2

Hi, had recently uninstalled AudioTuner to try and install Viper4Android. That doesn't seem to work at the moment. So I now need to reinstall AudioTuner until someone figures out a way to get Viper4Android to work on OxgygenOS.

Tried installing the AudiTunerService and AudioTuner apks from OxygenOS 2.0 framework but it doesn't install. Help?