As mentioned, I've tried all the video settings (including SAP on/off).
I don't even have a regular TV hooked up, other than an old analog on the security camera. All the audio/video equipment (there's also another DVD player) in this conglomeration is stacked/stuffed in a low/deep cabinet and is a nightmare to get to.
As mentioned, too many irons in the fire to mess with it much. Still haven't repaired the rat-chewed wiring in the car.
Eish. Well, its gonna be either the DVR or that vcr that is having an issue with the audio from those two channels. You'll have to isolate it somehow to see where the problem is at.