So I have created this simple Viper4Android Cleaner script to take care of that.
I have tested this on all Nougat ROM available right now and it's working very well. The script will remove MusicFX, AudioFX, SoundFX or DSPManager.
Also in order to make V4A working inside any app, audio_effects.conf and audio_policy.conf needed to be replaced.
In short all you need to do is flash it in TWRP before or after V4A installation.After when you boot up there is no need to update driver anymore.
It's all done, just turn that switch ON in V4A app and enjoy your favorite tunes.
ViPER4Android_22.214.171.124_guitardedhero.zip can be found here.