Game audio disappears when a call starts | Windows 11

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The short answer

If other audio becomes quieter during calls even with wired headphones, compare the Windows Communications setting with Do nothing. If audio moves to another device, inspect output selection. If only a Bluetooth headset changes quality, compare what happens when its microphone is used.

Play a short clip before joining and record whether volume, quality or output changes.
For quieter audio even over a wire, compare More sound settings → Communications.
For Bluetooth-only changes, compare with the PC’s built-in microphone as the call input.

Choose your next check

Start with the row that matches your situation. Change one setting at a time so you can tell what helped.

What you see	What to compare	Go to
Game volume drops during calls even with wired audio	Inspect Windows automatic volume reduction for communications.	Step 1
Game sound disappears while the caller uses another output	Compare Windows, game and calling-app output devices before and after joining.	Step 2
Only Bluetooth sounds worse or goes silent	Compare a separate microphone while retaining the same headset output.	Step 3
All audio is silent outside calls too	Inspect output and volume; this is not specifically a call-start change.	Step 2

Check in this order

Continue this issue

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Step 1: Compare the Windows Communications setting

Before the call, play a repeatable game scene or short video. Note the volume and Windows output device name; start at a comfortable listening level.
Open Start → Settings → System → Sound → More sound settings → Communications. Record the current option, such as reducing other sounds by 80%.
Select Do nothing → Apply → OK. With the same clip playing, join the call and compare. Any attenuation setting inside the calling app is a separate control.

Expected result or what you learned: If the other audio no longer drops, Windows communications volume adjustment may have contributed.
If something is wrong or unclear: If there is no change, inspect the app’s own attenuation and compare output selection in Step 2.
How to undo changes: Restore your recorded Communications option and Apply. You can retain automatic reduction if you prefer quieter background audio during calls.

Step 2: Compare game and call output devices

Before joining, note the selected device under Settings → System → Sound → Output.
Join the call and inspect Output again. While the game is producing sound, open Volume mixer and inspect the game and calling app separately: mute, level and output. An inactive app may not appear.
If only the game is muted or assigned elsewhere, select its intended output and compare the same scene. Lower volume before switching devices.

Expected result or what you learned: If both game and call play through the intended output, a device assignment mismatch is a possible explanation.
If something is wrong or unclear: If the same output changes quality only over Bluetooth, use Step 3. If all apps are silent, inspect the output device itself rather than assuming the calling app is broken.
How to undo changes: Restore the recorded per-app output choices and levels. Restart the app to check which selection it retains.

Step 3: Separate Bluetooth microphone behavior

Keep the Bluetooth headset as output, but select the PC’s built-in or another available microphone as the call input. Compare the same clip before and during the call.
If the separate microphone preserves playback, headset microphone use may be changing the audio mode. On compatible Windows 11 LE Audio systems only, inspect the headset’s Output properties → Output settings → Format → Format when microphone is active. Its availability depends on supported Windows, hardware and manufacturer drivers.
If that supported system glitches in Stereo, record the selection and compare Mono. If the option is absent, do not force it: compare a separate input microphone or a wired headset.

Expected result or what you learned: If a separate microphone restores the game audio, prioritize the headset’s behavior while its microphone is active.
If something is wrong or unclear: If audio still disappears with another microphone, use the results from Steps 1 and 2 to check app-specific attenuation.
How to undo changes: Restore the calling app’s previous input and any audio format you changed.

When to ask for help

Record wired versus Bluetooth use, output names before and during the call, the original Communications option and comparison result, and each app’s mixer level. Bluetooth features and available settings vary by Windows version, headset, PC and drivers; a missing option is not proof of a fault.

FAQ

Does a large volume drop during a call mean hardware failure?

Windows and calling apps can deliberately lower other sounds. Compare the same clip before and after changing the Communications option; an improvement is evidence about that setting, not proof about every component.

Why is the Bluetooth stereo option missing?

Stereo while the microphone is active requires a supported Windows 11 LE Audio setup, headset and manufacturer drivers. Use a separate input microphone to compare playback rather than looking for an unsupported switch.

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Sources

English adaptation of the Japanese guide, preserving its diagnostic branches, steps, results, undo instructions and official sources. Source instructions were reviewed; these comparisons are not claims of successful testing on every device. Menu availability depends on Windows, drivers and hardware. On a managed PC, ask the administrator before changing restricted settings.

Microsoft: Bluetooth LE Audio quality while using a microphone Microsoft: Windows Communications setting for lower sound during Teams meetings Microsoft: app volume and output settings