Thanks guys, it turns out it was a faulty ground, or more accurately, no ground. He forgot to connect the ground wire when he did the installation. Simple fix and the hum is gone. I appreciate your help.
Did the Cable Guy Do It?
I recently had the cable tech come in to fix a problem with poor picture on some channels. He fixed that problem just fine by replacing the splitter outside and running new cable to the box. However, now I'm getting a loud humming sound when I fire up the receiver that is apparently being caused by the DVD player audio connection. Whe I disconnect the audio out from the dvd player it goes away (along with the sound). I tried replacing the cable to the dvd player, but that's not the problem. Any ideas what could be causing this? Could it be the dvd player?