Originally Posted by mooshoodragon
in relation to this ARC, I'm trying to come up with some workarounds. I have to connect my AT4K directly to tv on HDMI with ARC, along with the Sony udp700 going into HDMI 2, (the player has separate audio and video HDMI outs, so that's fixed). Reason why is that my receiver is a bit old. it will pass 4k, but not HDR and DV. So in this scenario, will the AT4K still pass Atmos over ARC? I thought I read somewhere that ARC was limited to only 5.1DD...thoughts? atm I prefer not to upgrade the receiver (onk nr838).
...another question..if AT4K is plugged into HDMI 1 or 4, will I lose DV and HDR of AT4K?
And a quick shout out to Cleveland Plasma for a very rapid delivery (75" coming tomorrow). I was originally told 5-7 business days. This order took 2 days. I had to scramble to buy new accessories and cables as well as schedule the installer. good problem to have though!
I have the X900F and an LG B7A. I have ATV4K on both. So, the ATV4K outputs Atmos as LPCM, not bitstream. This can be a problem for ARC. Basically, the ATV takes the stream from Netflix, for example, and decodes it from the streaming apps and then sends a TrueHD compatible stream out to whatever port you are sending it to. This is LPCM.
In the B7A's case, it can detect TrueHD and re encode it to DD+ Atmos. ARC can only handle DD+ Atmos without eARC. That is 192HZ. TrueHD is much larger bandwidth. In the X900F's case, it also uses ARC to send DD+ Atmos from the internal apps and if your sound setup can detect Atmos from DD+, it will play appropriately over ARC.
I don't believe, but someone please correct me, that the X900F can re encode a TrueHD in to DD+. This means that the ATV on an X900F cannot transmit Atmos over ARC. However, you may see some LG owners claim they get Atmos over ARC from the ATV. They are correct.
So, you would need a splitter since your AVR doesn't support HDR. You can find the ViewHD VHD-UHAE2 on Amazon and it takes an HDMI signal in, passes it through as is on one port, then extracts Audio as is on another port. I have this and send the video to my TV, and the audio to an HW-K950. I get Dolby Vision on screen and Atmos on the K950 with the ATV4K. My K950 doesn't support Dolby Vision and can't see Atmos over ARC. I have an N950 coming that will support Dolby Vision and see Atmos on ARC.
For your scenario, you will probably need that ViewHD splitter.
Also, you need to plug your AVR into the ARC port. Plugging the ATV into that port only if you aren't using ARC, because there will be nowhere for the audio to come out of the TV then.
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