Music Players with Equalizer Almost Killing Battery on nubia
It's the manufacturer, nubia's fault.

nubia pretty makes a lot of non-regular functions in their ROMs, namely nubia UI. It implements its own fingerprint API (which is not compatible with any existing ones), its own charging detection and its own immersive status bar. This time it's nubia's own music effects API.

Both Poweramp and Musixmatch calls AOSP's MusicFX API for equalizers, but on nubia this does not exist. So everything that should have been done by DAC is done by CPU instead. Adding that Snapdragon 810 is a burny stuff, the phone gets hot very quickly.