Why is Call of Duty: Black Ops 6 using the wrong microphone on PC?

Voice chat in BO6 is completely dead for me even though the same headset works fine in Discord and every other game. No error, no muted icon, nothing — teammates just can’t hear me. Toggling push-to-talk on and off doesn’t do anything either.

Is there a quick way to tell whether this is a game settings problem or a Windows input device problem before I start reinstalling stuff? On a wireless headset (HyperX Cloud II Wireless) if that matters.

Classic BO6 mic weirdness — the game is notorious for grabbing the wrong input device without telling you. And since you’re on a wireless headset, I’d bet money on one specific cause, but let’s isolate it properly first.

The 30-second test:

Open Windows Sound settings (Settings → System → Sound), scroll to Input, and talk. Meter moves for your headset? Windows is fine, it’s the game. Meter dead there too? It’s Windows/driver territory and no in-game setting will save you.

• Settings → Privacy & Security → Microphone → “Let desktop apps access your microphone” must be ON. Windows updates love flipping this off, and mics die silently in games with zero error.

• Run mmsys.cpl → Recording tab. Set the headset as BOTH “Default Device” and “Default Communication Device.” COD pulls from the communication device, which is often still pointing at a webcam or motherboard jack.

• Mic Properties → Advanced → uncheck “Allow applications to take exclusive control.”

Game side:

• Settings → Audio → Voice Chat → set Microphone Device to your headset by name, not “Default System Device.” Already set by name? Flip it to Default and back — the selector is buggy.

• There’s a mic test meter right in that tab, use it instead of asking teammates every round.

The wireless-specific one (this is probably you):

BO6 only scans audio devices at launch. If the headset’s USB dongle connects or the headset powers on after the game is running, it simply doesn’t exist as far as COD is concerned — no error, just silence. Headset on and connected first, then launch the game. This alone fixes most of these threads for wireless users.

If you run SteelSeries Sonar / Voicemeeter / Nahimic: virtual audio devices confuse COD’s device picker badly. Point both Windows and the game at the same virtual device, or disable the software while testing.

Do the device check in this order:

1. In Windows Sound, set the real headset mic as both Default Input and Default Communications Device.
2. In Privacy & security → Microphone, allow desktop apps to use the mic.
3. Close virtual audio tools and unplug unused webcams or controllers with microphones.
4. In Call of Duty: Black Ops 6, select the device explicitly instead of leaving it on “Default,” then test open mic and push-to-talk separately.
5. Disable exclusive mode for the mic in its Advanced properties if another app keeps taking control.
6. Restart the game after changing the Windows default; many games read the device only at launch.

Also check shader preloading, texture streaming, DirectX errors, and packet loss. Do not reinstall audio drivers until the mic fails in Windows Voice Recorder too.