Devices > Video Cards, Monitors, Televisions, and Projectors
Need advice on HDMI to PCM decoding
Bob4K:
--- Quote ---Normally SPDIF cannot carry lossless Multi-Channel Signals (DTS-HD, TrueHD). This may be different this case since I also don't think normal SPDIF can carry 16 Channels.
--- End quote ---
The Goldmund decodes to PCM (if there is no problem) any HDMI stream, and then repackages 2 by 2 each channel on the SPDIF outputs that remain standard stereo ones.
Output 1 can carry for example L+R
Output 2 can carry SR+SL
Output 3 can carry (SUB Left + LowFrequency filetered of SL) + (SUB Right + LowFrequency filetered of SR)
and so on.
It outputs what ever input channel (mixed with another if needed, and frequency and phase filtered) to any of the 8x2 stereo outputs.
craigmcg:
I'm not the expert that some JRiver users are but it seems to me that you could simplify the signal chain you mention to avoid some of the issues that you are reporting.
My "keep it simple" suggestion would be to test then use a powerful Windows pc to be the source instead of the high end Android box you mention. Most modern video cards have support for multiple monitors/video outputs and can do upscaling with or without AI enhancements. You could connect one of the video card's HDMI to the projector and another to the Goldmund. This should avoid the need for the use of the Dune Solo 8k and the Oppo 203 reducing the number of places where something could go wrong.
My two cents.
David Sydney:
You said you are building a HTPC set up? A Standard PC builds can split audio and video to different devices anyway? If you player is USB / streaming or SATA device, then the PC itself can spit the video and Sound to separate devices that you choose. Most GPU card have more that one video output either HDMI or DP which windows can control as extended /mirrored etc. Video would go out to your display device and sound can go out via digital audio if your motherboard supports it or USB to your DAC/amplifier - again you can choose which device the audio is passed to. No need for HDMI hardware splitters to do anything?
Bob4K:
I like the Dune, I don't want an HTPC.
Except if I can't find another solution as a plug & forget device serving as a very specialized splitter.
I am going to test an HDFury AVR Key though. It's a splitter specialized in solving HDMI audio problems. If that works, I won't need JRiver, but that's not sure at all.
Another avenue would be to use an HDCP stripper to connect the Dune: posting on various forums like this one and getting feedback made me think that perhaps the HDCP Dune implementation is not 100% right, and my processor just does not accept it. Without HDCP at all, it might no longer have decoding problems.
Thinking of it, it seems more problable than some handshaking problem.
Bob4K:
--- Quote from: David Sydney on October 20, 2024, 04:57:17 am ---You said you are building a HTPC set up?
--- End quote ---
Not at all, I want to keep my Dune as the sole source.
An HTPC built as a plug & forget splitter able to decode streams to PCM is just an idea to solve the connectivity problem between the Dune and my Goldmund processor.
I got other ideas discussing here and on other forums: maybe use an HDFury AVR Key, a splitter optimized to solve audio problems, or use an HDCP stripper behind the Dune. The Dune HDCP might not be 100% compliant, which could very well mute the Goldmund.
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