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Highly recommend avoiding putting conversion devices in the signal path, shouldn't need to, and it will only confuse where the pure surround signal may be compromised. If you are not interested in directly patching from set-top boxes or DVD/Blu/4k players to the ES, and you can manage through configuring the native audio pass thru on the 55", definitely use "any" Toslink optical cable between the two. Don't settle for "PCM" at the ES when your actual Dolby/DTS... content is playing (trailers aren't always 5.1+) A $10 cable can be just as good as a $50 cable because it's light-piped digital and there's no improvement on "if it works, it works". Any toslink cable from Walmart will do if you're looking for immediate gratification (although that budget cable company that rhymes with "fawn" is not high on my suggestion list). Still the toslink will work if the optical signal is at all connected. Best of Luck!
Sorry, there was a problem. Please try again later.Thank you, @SonettV4, for your answer! I ended up establishing 2 optical toslink connections -- one between the TV and ES for TV-originated audio (e.g., Spotify, NetFlix) and another between my Comcast cable tv box and the ES for cable-originated audio. My family and I enjoying the audio upgrade!
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