Why your audio sounds bad during Windows calls

Two modes, and only one sounds good

Bluetooth headphones can run in a stereo mode built for listening, or in a hands-free mode built for talking. The hands-free mode carries a microphone channel, and to fit it, the audio quality drops sharply — the sound becomes narrow and dull.

Windows cannot run both at once. The moment any application opens the headset microphone, everything you hear switches to the low-quality path, including music playing in another window.

The app causing it may not be the one you are using

A meeting app left running in the background, a browser tab holding microphone permission, or a voice assistant can each hold the microphone open and keep you stuck in hands-free mode long after the call ended.

1. 1Open Settings, then Privacy & security, then Microphone.
2. 2Look at the list of apps with recent microphone access.
3. 3Close or revoke the one that is holding it, then start playback again.

Use a different microphone

The most reliable fix is to stop using the headphone microphone entirely. Select your laptop microphone or a separate one in the call application, and leave the headphones as output only.

Audio then stays in stereo mode for the whole call, and the people on the other end usually hear you better as well.

Disable the headset endpoint when you never need it

If you never use the headphone microphone, the headset endpoint can be disabled in Sound settings so Windows stops switching to it. Re-enable it if you later need that microphone.