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Yes actually both are digital, just different medium. And overkill for the low bandwidth of sound.
Sorry, there was a problem. Please try again later.Coaxial cable do support surround sound 5.1 or 7.1 but does not support DTS-HD Master Audio and Dolby TrueHD.
Sorry, there was a problem. Please try again later.It doesnt replace it but another type of audio connection. Optical is very good but seldom used now.
Sorry, there was a problem. Please try again later.Yup
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