Viper4Android alternative?

[gotwillk]

Coming from an S6 with root, I'm REALLY missing Viper4Android. I used it mainly for the significant volume boost when watching mkv files with my bluetooth earbuds. For some reason, all BT earbuds give out much lower volume when watching mkv files compared to wired earbuds.

Any one know of a good alternative for V4A? Or at least a good app to boost the volume for BT headsets?

 

[ShaunWinSC]

I also am looking for a Viper alternative, one that does require root would be great.