[Windows 11][Audio Issue] System audio going through headset microphone

Resolving Audio Routing Issues in Windows 11: When System Sound Is Played Through Headset Microphone

Are you experiencing unexpected audio behavior while using your Windows 11 computer with a gaming headset? Specifically, if system sounds such as YouTube videos or game audio are being transmitted through your microphone during voice calls, it can be both disruptive and confusing. This guide aims to help you diagnose and resolve common audio routing issues that may cause your system audio to inadvertently pass through your headset microphone, particularly when using communication platforms like Discord.

Understanding the Issue

Many users have reported that during voice calls—such as those on Discord—the audio from their system (music, videos, or game sounds) is being transmitted to other participants as if they were speaking into their microphone. Interestingly, conversations reveal that the system audio comes through at volumes comparable to or even louder than the user’s actual microphone input, often with high clarity. This problem appears to persist regardless of the headset model, including high-quality brands like HyperX Cloud Alpha, and is not necessarily hardware-related.

Common Factors and Observations

• The issue occurs during voice calls on platforms like Discord.
• System audio (not microphone input) is being transmitted.
• The audio sometimes appears to be of equal or greater loudness than the microphone.
• Adjusting Discord or application-specific audio settings does not resolve the problem.
• The problem persists across different headsets, indicating it may relate to system configurations.
• Windows 11’s sound settings show the microphone activity indicator when someone speaks in a call.

Troubleshooting and Solutions

1. Check Default Recording and Playback Devices

2. Open Settings > System > Sound.

3. Under Input, ensure the correct microphone is selected.
4. Under Output, verify the correct playback device (your headset) is active.

5. Make sure that the headset isn’t set as the default device for both input and output in an unintended way.

6. Inspect Windows Sound Settings

7. Navigate to Control Panel > Sound > Recording tab.

8. Select your microphone, then click Properties.
9. Go to the Listen tab and ensure the Listen to this device option is not enabled.

10. Disable any Stereo Mix or What U Hear options, which can cause system audio to be routed through the microphone.

11. Disable “Stereo Mix” or Similar Inputs

12. In