Hi boilercork! The HW-T650 features HDMI passthrough, allowing you to connect your cable box to the soundbar, then use HDMI ARC from the soundbar to the TV. The cable box will send the audio to the soundbar and pass the video through to your TV. For additional assistance with the connection setup contact Samsung support at:
1-800-SAMSUNG / Available 8AM - 12AM EST, 7 days a week.
LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you.
^Tim