I have a Spectrum cable box that does have a digital audio sound output. I am not using it. I use HDMI cable to the TV from the cable box for the picture and sound, and use the TV's digital audio out sound to my soundbar. That way anything playing on the TV (I also have a BluRay attached to the TV via HDMI) uses the soundbar. The TV has to be set to output the sound to the digital audio sound output to get the soundbar to work.