Facetime voice sounds like a robot
After I have updated my iMac to macOS Monterey my voice a well as the voice of the other party sounds like a robot. The voice is also scrambled, not clear to understand, and breaking up.
Using a Bluetooth headset like AirPods does not make any problems, the voice is crystal clear.
Any idea how to fix it is highly welcome.
iMac 27″ 5K, macOS 12.1