Not all HD channels giving me 5.1 surround sound
I have had this issue ever since I got X1 back in 2016. But not all channels gives me 5.1 surround sound, during live TV, or DVR'd recordings. Only thing that is 5.1 at times is on demand. I will give an example, NBC is only in stereo while CBS is in 5.1 surround sound.
This is how I have my X1 box connected to my equipment, I have it plugged into one of the HDMI ports on the home theater receiver. Then the output HDMI cable goes into my TV. Even when I ran optical, it gave me the same results.
Are all HD channels 5.1 surround sound or does the stations dictate that? I would assume the given price of cable, all HD channels would have a 5.1 surround sound audio track.