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I'm using the optical cable & the tv remote to my LG Smart TV does work to control the volume on the sound bar. Also the remote to my roku also works to control volume on the sound bar.
Sorry, there was a problem. Please try again later.Hi MarkS. Regrettably, there are about three models that fall under that description of "LG TV (50” UN7000 Series - 4K UHD TV -Smart - LED with HDR)" and without a model number, we cannot determine which remote the TV in question has. If it is the LG 50 inch Class 4K Smart UHD TV with AI ThinQ® (49.5'' Diag), Model # 50UN7300PUF, that model comes with an LG Magic Remote and it has a Universal Remote Control feature (Auto Device Detection) that you can set up so you can control the peripherals (Blu-ray / DVD player, home theater, set-top box, etc.) with the Magic Remote rather than using their dedicated remote controls. When you connect the devices to be set to the TV's HDMI IN, and turn the power of the device on, the TV will recognize the connected device to automatically set the universal remote control without manual setting.If the universal remote control is not automatically set or it is connected to the AV IN / COMPONENT IN, you can manually set it. If that is not the TV that you have, you can control some functions of this unit with your TV remote control or even with some remotes from Panasonic, Philips, Samsung, Sharp, Sony, Toshiba or Vizio TVs. The controllable functions are volume up/down and mute. Depending on the remote control, this function may not work well...^IFV
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