Facetime Distorted Audio
My 2019 iMac has developed a problem with audio during FaceTime video calls. The audio is distorted with participants sounding like Donald Duck and all words incomprehensible. Audio is normal on this iMac when using Skype and Zoom video calls. I am able to make FaceTime calls using the same Apple ID from a 2013 iMac, a 2020 M1MacBook Air, 2 iPads and an iPhone 13. How should I set about fixing this problem?
iMac Line (2012 and Later)