Looks like at least one of the eggs is pipped!!! The pip is the first hole the chick makes in the shell as it begins to hatch:
Hatching can take some time. The chick will work on pecking out for a bit then rest, then more pecking, then rest, etc. Because of the time involved it's possible we may not see a chick until Sunday. But in the meantime, the chick will chirp from inside the egg and that is often picked up by the microphone inside the nestbox so listen carefully as you are watching. Weather in Columbus today is a very chilly rain (mid-40s) so Durand no doubt will keep the eggs covered pretty good. Here's a video of Durand adjusting the eggs when the pip was first seen.