After changing any VoIP setting, leave the audio menu and fire your gun. The game needs to "reset" the audio engine for changes to apply. A full game restart is even better.
Technical Issue: BF4 VOIP Routing to Wrong Device / Not Initializing Battlefield game chat settings issue - Facebook Battlefield 4 Voip Not Working
Some network drivers use Quality of Service (QoS) that deprioritizes VoIP packets. After changing any VoIP setting, leave the audio
VoIP traffic travels on different ports than game traffic. If your router or Windows Firewall is blocking these, you will have one-way or zero voice transmission. Technical Issue: BF4 VOIP Routing to Wrong Device
BF4 often sends game audio to the default device but routes VOIP specifically to the default communication device. If these differ (e.g., your monitor is set as the communication device), you won't hear your squad. 2. Verify In-Game VOIP Settings
– VOIP often fails without admin rights.
Unlike modern games that use Discord-integrated APIs, BF4’s VoIP is old-school. It uses the to detect your microphone and headset. If Windows doesn’t recognize your headset as the "Default Communication Device," BF4 will ignore it entirely. Furthermore, the game uses specific UDP ports for voice traffic, separate from game data.