Re: Voip not working on battlefield 4 on pc
I think I figured it out...at least for my setup, which was affected in the same exact way.
Short story: It seems to be the latest NVidia GEForce Experience Beta releases--v2.7.2.59, in my case. Uninstall and go back to the current public release, v2.5.15.54 (or maybe an earlier beta version, if possible?).
Long story: I noticed that, with the latest beta releases of GFE, they're adding a keyboard shortcut to bring up an overlay where you can change settings/record/etc. The shortcut is ALT-Z. I figured that this shortcut was basically "short circuiting" the default VOIP button for BF4, the LALT key. That said, reassigning the VOIP key to something different in BF4 didn't seem to take care of it. I'm still convinced it must have something to do with it, though.
I'm going to reach out to the NVidia folks and let them know--hopefully it can be resolved in a future release.