Hi, I found this on Battlelog from Caipi1975 https://battlelog.battlefield.com/bf4/en/forum/threadview/2955065670123559775/15/
"This one is the only fix for me that works since the last patch.
Create a user.cfg in the battlefield 4 folder.
In the cfg paste gametime.maxvariablefps 121
The 121 is the max FPS.So you can choose 61 or 121 fps.Both works for me perfect.Give it a try.
Working with Nvidia GTX 660 from Asus and Driver 332.21.Should also be ok for AMD cards.
The RenderDevice.RenderAheadLimit 3 worked only with the previous updates and then only with1 instead of 3.
Withour the user.cfg Metro and Locker crashes after 10 seconds or after a few minutes of gameplay."
And this was recently posted by cooperpl http://answers.ea.com/t5/Battlefield-4/Sound-loop-crash-PC/m-p/2379553#U2379553
"PLEASE change sound settings from War Tapes to Home Cinema it may help with sound crash and freeze. "
(If it helps then click the link and give him an XP)
Also, pOw3rful1, could you please provide some details of your system and any error that shows up too, thanks.