So after having this issue myself and speaking with EA over the phone, it seems like this is such a new issue it's hard for people to diagnose, thanks to reddit user Rukudo, he posted this fix which seems to work for me. I've pasted his response below, it seems like an issue in Borderless mode, I'm assuming EA will release an update shortly to address this issue.
Found a solution that worked for me. Seems like the game launching in borderless mode was an issue. I went to my PROFSAVE_profile file in the Battlefield 4 settings and edited the following lines to look like:
For nubs, here's a step by step guide:
- Go to this location C:\Documents\Battlefield 4\settings or wherever your primary documents folder is.
- Open "PROFSAVE_profile" with Wordpad / Notepad++
- Lines 28, 29 & 31 must be set to the same options as the quoted post above, this is what it should look like
Done! The game should run as expected now, if you're still running into issues, check the Realtek Audio Driver as this is something that could also influence the issue.