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Which LG 85 Series 75" TV are you inquiring about, what is the model number for the TV? The LG 5.1-Channel S60TR Home Theater Soundbar with Wireless Subwoofer and Rear Speakers, Dolby Audio™, WOW Orchestra - Black, Model # S60TR, can be connected to LG TVs in one of three ways. It can be paired via Bluetooth® with any Bluetooth-enabled LG Smart TV, it has an Audio Return Channel (ARC) that can be connected to the ARC/eARC port on any LG Smart TV, and it has an Optical Digital Audio Input that can be connected to an Optical Digital Audio Output on any LG Smart TV. HDMI ARC can introduce audio lag, especially when using older devices or when the audio path is longer. This lag can be minimized by using a high-speed HDMI cable and ensuring that the TV and soundbar support ARC/eARC. HDMI eARC is designed to reduce audio lag, but the extent of this reduction can vary based on the setup and the specific devices used. Connecting an audio device with an HDMI eARC port to a TV with an HDMI eARC port ensures that avoid any potential audio delays...^Ivan.
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