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If you want to hear audio from your TV or make it like surround sound yes you do need an HDMI cord it comes with an optical cord.
Sorry, there was a problem. Please try again later.You can use the hdmi if you have arc. I would recommend that. If not you can also connect it to your tv via fiber optic.
Sorry, there was a problem. Please try again later.Only if you want to control the volume using the tv's remote - depending on the system's compatibility.
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