Since the last update 1.68 (from 16.03.2017)
When enemies/people are not in sight of you the gunfire sound is too quiet. You can hear some shots, but it sounds like miles away. Updated my drivers, checked gamefiles with steam etc. -> nothing works. Tested on 32 & 64 bit.
Here a short video to show the problem -> https://www.youtube.com/watch?v=-b2BTKme5CY&feature=youtu.be
PS: Tested with 2 friends as well. They have all the same problem!