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My Sony Sony WH-CH700N bluetooth headphones are no longer working properly when connected to a Windows 10 PC that they previously worked with. When connected, I see two options when clicking on the sound icon in the taskbar and clicking on the up arrow:

  • Choosing Headset (WH-CH700N Hands-Free AG Audio) results in poor sound quality
  • Choosing Headphones (WH-CH700N Stereo) results in no sound

A Sony help page for the headphones says

If you have previously connected the headset to this Bluetooth device, only an HFP/HSP Bluetooth connection may be made when the headset is turned on. If this happens, use the Bluetooth device and make an A2DP Bluetooth connection.

Is that a possible factor?

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Update: I had a similar issue with my Sony WF-1000XM4 earphones when I had Davinci Resolve open. My answer applies for it too.

I figured out the solution, helped by stumbling upon this answer. This could apply to other bluetooth headphones too.

  1. Open Settings

    • Windows 11: go to Settings > Bluetooth & devices > Devices, scroll down to "Related settings" and click on "More device and printer settings"
    • Windows 10: go to Settings > Devices, then on the right under "Related settings", click on "Devices and printers"

  2. Right click on the headphones and click "Properties"

  3. Go to the "Services" tab and, in my case, untick "Hands free Telephony"

I then had to turn off the bluetooth in Windows, then it on again and reconnect to the headphones. After that, the sound worked and was clear. I no longer got the "WH-CH700N Hands-Free AG Audio" option, only the "WH-CH700N Stereo" option

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  • Thank you SO much for this one -- works with my c700n as well!
    – Eugene D. Gubenkov
    Commented Feb 17 at 19:57

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