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HDMI1 OUT TO TV on the LG Streaming 4K Ultra HD Hi-Res Audio Wi-Fi Built-In Blu-ray Disc™ Player with Dolby Vision®, Model # UBK90 has to connect to your TV and HDMI OUT (HDMI2 AUDIO ONLY) is what you would use to connect to an external receiver, Home Theater System, or Soundbar. You do not need it to connect to just your TV...^IFV
Sorry, there was a problem. Please try again later.I use a single HDMI out to TV, and use the TV connectors out to my sound bar. However, if you're question is in regard to connecting the HDMI directly out to a sound bar or speakers for listening to music, then I would say that it should most likely work without any issue. But I have not tried this myself, good luck!!
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