Some? TVs don't enable volume via Optical output. If you can use HDMI ARC. If so, make sure CEC is turned on for the HDMI input from your source. If all that is set up use the TV remote to control the volume of the Soundbar via CES/HDMI ARC. If that works OK, then program your Cable Remote to control your TV volume control which will then control the sound bar. I'm sure someone smarter will correct me but that's my idea.
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