I've got a bizarre ongoing issue with both Teams and Zoom where I (apparently) sometimes sound like a chipmunk. This was funny the first couple of times in April, not so much now. Almost certainly sample rate related, but very hard to diagnose as one-to-one or echo calls are usually fine, suspect it's partly caused by other people's setups (reliably happens in meetings where certain people are involved and not in others). Switching microphones (from webcam to soundcard) usually fixes it. Don't know if it's pulseaudio or buggy software (the soundcard is envy24 based, wouldn't be too surprised if something is getting set up for 96kHz and then being surprised to get half that).