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ARC / eARC COMPATIBILITY - Marantz
https://support-uk.marantz.com/app/answers/detail/a_id/6334/~/arc-%2F-earc-compatibility
The Audio Return Channel (ARC) introduced with HDMI 1.4 function in AV receivers in general supports the same formats that are traditionally send through S/P-DIF interfaces (optical or coaxial connections). These are the following formats: PCM (2 channel) Dolby Digital (up to 5.1 channel) DTS Digital Surround (up to 5.1 channel)
Connection 1 - Marantz
https://manuals.marantz.com/NR1605/NA/EN/GFNFSYwysioymk.php
Connection 1 : TV equipped with an HDMI connector and compatible with the ARC (Audio Return Channel) Use an HDMI cable to connect a TV that is compatible with the ARC function to this unit. Set “HDMI Control” to “On” when using a TV that supports the ARC function. link.
Marantz SR1604 Audio Return Channel (ARC) with Samsung UHD ...
https://www.avsforum.com/threads/marantz-sr1604-audio-return-channel-arc-with-samsung-uhd-hu8550.2087370/
I couldn't get the Audio Return Channel (ARC) working between my Marantz SR1604 and Samsung UHD HU8550 despite searching every site I could find with reference to ARC and Samsung Marantz. Most of the feedback was to ditch ARC and just go optical audio, but I figured it out and got it working...
CONFIGURING YOUR RECEIVER FOR TV AUDIO - Marantz
https://support-uk.marantz.com/app/answers/detail/a_id/957/~/configuring-your-receiver-for-tv-audio---arc-%26-optical
How to get TV Audio via your Denon AV Receiver with an (ARC) connection. If playback doesn't begin shortly, try restarting your device. Videos you watch may be added to the TV's watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.
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