Im reporting this as BS player bug, because it is working normally on other players and in games or youtube, i tried changing surround output in BS settings, but with no effect, also tried changing decoder for audio with no effect, so i need help to solve this???? Im using Win 10 with latest build, and Razer Kraken USB headphones with BS player 2.74.

Audio setup it's some legacy from BSPlayer v1. That part isn't functional from long time ago. Audio changes can made through options -> filters ->AC3Filter and LAV audio decoder. Usually this problem was reported many time and was solved from audio setup, balance. Slider in the middle

balance is not an issue