Problem with sound in games to Win 1.

The topic title was a typo))
Faced with such a problem. In absolutely all games, for example when I rotate the camera, I don't hear what the characters speak from behind or hear but very quiet. At the same time with the rest of the sounds does not. Suffer only the dialogues of the characters. In General the dialogues of the characters are not three-dimensional.
Follow the principle everything was fine before and suddenly something broke.
So the speakers I have, I use headphones.
1) Now is Win 10 1903, the September build. And driver Realtek HD 2.81.
2) In the Realtek Manager, I tried all settings. The only thing that helped me is a change of audio format. But it partially solved the problem, ie not in all games.
3) Generally demolished the Realtek driver, and BAM everything worked as before. Ie the character's dialogue is heard at 360° equally.
4) That's just previously I used Win 10 1809, and the same Realtek driver, and no problems with sound in games. Set in 1903,thus began.
5) it is Clear that it is possible to abandon the Realtek driver, but I can't play without him in the game. With the native driver the sound is much nicer than the standard driver Win10.
Not really could be the problem? If someone is faced, unsubscribe.