Originally Posted by googlymoogly
Thanks for the response. Now I'm really confused. The ARC HDMI port on the TV is an input. Doesn't audio RETURN channel mean the TV is returning something back to the 150?
Yes, but only when the audio ORIGINATES on the TV side of things. If you had your cable box connected to the TV you would need to send audio TO the CT150. When you have the cable box connected directly to the CT150 you are not sending any audio to the TV, just video.
Also, the 150 manual shows that, if you don't have ARC on your TV, then you put an optical audio cable from the OUT of the TV to the IN of the 150, while the non-ARC HDMI is going from OUT on the 150 to IN on the TV. I'm having trouble reasoning that they want anything else besides for the TV to send an audio signal back to the 150. What am I missing?
Again, if your source devices are connected to the CT150, you aren't sending audio FROM the TV.
You only need to send audio FROM the TV if you have source devices connected to it, or you use the TV's internal tuner, or you use smart apps on the TV. If any of those apply, then you either need ARC or a digital connection to output audio.