Thanks to the Lord's mercies, we quickly resolved the problem with WHVC this past Wednesday.  The problem was apparently a power glitch that caused our audio processor to hang. A thunderstorm moved through the area at the same time as the outage.  A simple reboot solved the problem. 

Now we need to explore looking into getting a double conversion UPS on our equipment. That would have better protected us than our single conversion UPS that we do have.