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A comment on When HDMI 2.1 isn't HDMI 2.1 – the confusing world of the standard. Parent comment

Re:When HDMI 2.1 isn't HDMI 2.1 – the confusing world of the... by tzs on Monday December 13, 2021 @08:53PM (#29547229)
> The older ARC spec would work with any HDMI cable, but bandwidth limitations only allowed compressed 5.1 surround sound.

My 2012 Denon AVR-1913 won't do ARC with just any HDMI cable. According to the manual it must be an HDMI with ethernet cable and experiment has shown that the manual is correct.

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