I'm just using the stock ROM but... here's where I've had success:Still can't get it to freakin work. Did a new ROM install (Temaseks Unofficial Cm12), permissive kernel (LeanKernel 1.3+). Tried with enforcing on and permissive. Tried disabling and enabling NuPlayer. SuperSU enabled on root. Tried several V4A zips. Still can't get anything to work, just does not process the music. Streaming services like Pandora or using the stock music player. Nadda.
Wtf am I doing wrong?
Install SELinux Mode Changer, set mode to permissive (This is REQUIRED for Viper to work)
Install all 3 zips and success. (No lolliviper zip)
OR
Install Viper4Android plus build.prop zip with SELinux mode changer
OR (trying now, haven't confirmed working myself yet)
flash Lolliviper from OP + build.prop zip from the 3 zips along with SELinux mode changer, run Viper in compatibility mode.