I have Cox cable. You must hook up both the digital cable AND the 2-channel analog from the cable box to the receiver. Both should be hooked up to the same device. In my receiver (Onkyo), I have them both plugged into video 3.
The 2 channel analog runs directly into the audio input for video 3. But, I have the digital plugged into my digital input 3, and must go into the receiver's input menu and assign digital input 3 to video 3. Then, when the audio from the cable is digital, the receiver automatically chooses the digital signal, and when it's analog, it chooses the analog signal.
