Does this experience sound at all familiar: You're trying to set up a teleconference and you can see the other person, but can't get the audio to work.
Or only one of you can hear the other. Eventually, despite this having worked fine just yesterday, you end up taking out your phones to make the conversation happen.
That was the case when Stephen Colbert was trying to get Daniel Radcliffe on the line last Tuesday for what The Late Show has become in the time of the COVID-19 pandemic—an entirely at-home production.