In PUBG, the rear voice of the game character can't be heard

I try to find the problem.
It seems to be because fxsound thinks it’s a 5.1 channel device, but doesn’t output all of the 5.1 channel sound to my sound card (Scarlett 2i4). Because my soundcard is 2-channel, it loses the sound information from the back channels.

I tried adjusting the channel of the FXsound Audio Enhancer device in windows sound from 5.1 to stereo, but it automatically changes back to 5.1!

Sorry FxSound has some issues with surround sound systems that we don’t really have the capacity at the moment to fix. I’d suggest quitting FxSound before playing PUBG.