I disconnected the splitter....Had the same audio crackle. I moved the camera from channel 2 to 12....same problem. There are no audio cables connected on the back of the DVR. The run to the monitor in question is about 60 feet and has the HDMI cable with the chip set to assist with signal loss. So, I think it could be the cable to the monitor, the cable to the camera. The image is very good quality.
Any more suggestions?