4x RCA to HDMI for Quadraphonic Record Player / Quad Demodulator to Use On HDMI Only System

[wrat]

an older receiver that has analog mch input AND component video AND dual hdmi output should accomplish what you desire , those era devices allowed analog to hdmi conversion

 

[ClassicalSurroundFan]

an older receiver that has analog mch input AND component video AND dual hdmi output should accomplish what you desire , those era devices allowed analog to hdmi conversion

If you can find just one that will do this, please let us know.

 

[wrat]

If you can find just one that will do this, please let us know.

well suffice to say I had a pioneer elite that would convert analog to hdmi and had 7.1 analog inputs and I bet it could have been tweaked to do what is described

 

[quadsearcher]

I sent them an email on this question and waiting to hear back, I am gladly throwing my money at this problem if they can sell me something I will gladly buy it. I see they added optical in, but not out! Looks like it takes optical or stereo RCA in and converts it to MCH RCA out which my Onkyo can't use. It's a surround decoder, we need a surround encoder. I'm raising an eyebrow at taking apart two of those stereo RCA to HDMI converters to see if it's possible to wire up one to the other HDMI out... thinking on it... If there's such a device for stereo, I can't see why there is no such device for MCH. I have yet to see one.

"taking apart two of those stereo RCA to HDMI converters to see if it's possible to wire up one to the other HDMI out."
This one I know the answer to. It's not one-to-one wiring. There's a dedicated chip in-between powered by 5v carried by the cable, it's function is ADC which is then wrapped in a serial data package that the receiving device understands, and sent over differential pairs. With MC audio there is additionally a different codec .

I've long thought that HDMI's primary purpose is copy protection. HDSDI is a pro production standard that carries basically as much info (not including consumer stuff like ARC), is extremely robust over 300' instead of 45', over a single coax.
But it is the standard they gave us.

 

[gene_stl]

I think that any system that has an HDMI output may have a copy protection flag that analog inputs may not trigger. So youneed to be prepared for HDMI preventing you from doing this. HDMI only wants to transmit crap that has HDCP or whatever the F it is copy protection. I doubt that any consumer product will go from analog to HDMI. I think that may be a job that requires an audio interface and a computer and software as mentioned above. But do report what you find.

 

[DudeRocks]

"taking apart two of those stereo RCA to HDMI converters to see if it's possible to wire up one to the other HDMI out."
This one I know the answer to. It's not one-to-one wiring. There's a dedicated chip in-between powered by 5v carried by the cable, it's function is ADC which is then wrapped in a serial data package that the receiving device understands, and sent over differential pairs. With MC audio there is additionally a different codec .

I've long thought that HDMI's primary purpose is copy protection. HDSDI is a pro production standard that carries basically as much info (not including consumer stuff like ARC), is extremely robust over 300' instead of 45', over a single coax.
But it is the standard they gave us.

My thinking on this would be to follow the wires out on the first one, see what's not being used, then see if the second one run a direct wire from the left and right output on the HDMI head itself, if it works that way, and then solder it into one of the other HDMI audio signals out on the second device. So between the two, let's say they are both already wired to dato 0, if it works this way for audio, then hard wire the second device to the first device dato1. Google Image Result for https://i.pinimg.com/originals/d2/18/d2/d218d2162c0ddd2621a0b13f306245b0.jpg

 

[gene_stl]

I think the above approach would lead to great heartache. HDMI has handshaking going on and whatever device you tried this with are likely to be killed by the exercise.

Find a preprocessor that does what you want,

 

[DudeRocks]

I think the above approach would lead to great heartache. HDMI has handshaking going on and whatever device you tried this with are likely to be killed by the exercise.

Find a preprocessor that does what you want,

I'm here to find one that does what I want, do you have any suggestions?

 

[DuncanS]

My thinking on this would be to follow the wires out on the first one, see what's not being used, then see if the second one run a direct wire from the left and right output on the HDMI head itself, if it works that way, and then solder it into one of the other HDMI audio signals out on the second device. So between the two, let's say they are both already wired to dato 0, if it works this way for audio, then hard wire the second device to the first device dato1. Google Image Result for https://i.pinimg.com/originals/d2/18/d2/d218d2162c0ddd2621a0b13f306245b0.jpg

All signals are digital on HDMI, no analogue.

 

[ClassicalSurroundFan]

well suffice to say I had a pioneer elite that would convert analog to hdmi and had 7.1 analog inputs and I bet it could have been tweaked to do what is described

Do you have the model number? The purpose of hdmi out for an AVR is to go to a monitor, not another AVR, so there is basically no case anyone here has heard of where the audio on that hdmi isn’t downmixed to stereo.

 

[DudeRocks]

All signals are digital on HDMI, no analogue.

Right, so if the HDMI converter is only doing 2x rca to digital conversion we all know HDMI can move more than that. If the audio can be linked to specific pins on the HDMI cable itself when using a 2x rca to digital converter is it simply not using additional pins? In which case could a second converter be used to jump over to those additional not used pins? It probably won't work, but it could...

 

[DuncanS]

Right, so if the HDMI converter is only doing 2x rca to digital conversion we all know HDMI can move more than that. If the audio can be linked to specific pins on the HDMI cable itself when using a 2x rca to digital converter is it simply not using additional pins? In which case could a second converter be used to jump over to those additional not used pins? It probably won't work, but it could...

Unfortunately not. HDMI is a multiplexed digital data stream, so digital video and audio on the same signal connections, there is no one-to-one correspondence with a particular signal and a pin.

 

[DudeRocks]

Do you have the model number? The purpose of hdmi out for an AVR is to go to a monitor, not another AVR, so there is basically no case anyone here has heard of where the audio on that hdmi isn’t downmixed to stereo.

HDMI carries an entire atmos stream from my computer to the input on any device that will accept it. As far as the AVR is concerned it shouldn't care what device is sending the signal, it is just looking for that signal. Therefore it's only logical to look if there is some other device out there that can send such a signal to the AVR by HDMI that can take multiple channel RCA. You can see there are many options for stereo RCA to HDMI, but I can't find any that do 5.1 to HDMI, can you recommend one? rca to hdmi - Google Search

Model number Onkyo TX-NR7100 and it does not have MCH RCA input, hence the purpose of this entire thread.

 

[DudeRocks]

So the consensus is the HDMI people don't want anyone to output audio out of any receiver, so they hindered the creation of any form of MCH RCA to HDMI, but they allow 2ch RCA to HDMI just because. Good times.

 

[DuncanS]

HDMI carries an entire atmos stream from my computer to the input on any device that will accept it. As far as the AVR is concerned it shouldn't care what device is sending the signal, it is just looking for that signal. Therefore it's only logical to look if there is some other device out there that can send such a signal to the AVR by HDMI that can take multiple channel RCA. You can see there are many options for stereo RCA to HDMI, but I can't find any that do 5.1 to HDMI, can you recommend one? rca to hdmi - Google Search

Model number Onkyo TX-NR7100 and it does not have MCH RCA input, hence the purpose of this entire thread.

Can you connect your Quad signal source to a sound card on your PC (or an external USB device), then digitise them? You could then playback from your PC.

 

[ClassicalSurroundFan]

Ok, Dude, here is the only device I believe ever to be sold that did what you want IF you can find one used and if you have an old enough operating system to run it. There is no non-computer way. MOTU.com - Audio I/O

 

[DuncanS]

So the consensus is the HDMI people don't want anyone to output audio out of any receiver, so they hindered the creation of any form of MCH RCA to HDMI, but they allow 2ch RCA to HDMI just because. Good times.

HDMI was designed to make interconnections 'easy' for the average person (which it does - most of the time!) and to control/protect the copyright of the source material through the use of HDCP, which is a real pain (when nothing works is usually down to non-compatibility with the source HDCP encoding). To use HDMI in a design as a manufacturer you have to pay an annual licence fee (BTW I'm an Electronics Design Engineer), which for small specialist low volume items like 5.1/7.1 to HDMI probably kills it off before it reaches the drawing board.

 

[J. PUPSTER]

Ok, Dude, here is the only device I believe ever to be sold that did what you want IF you can find one used and if you have an old enough operating system to run it. There is no non-computer way. MOTU.com - Audio I/O

here's one on eBay

https://www.ebay.com/sch/i.html?_nk...vPOGyLrHJ4mie0cFsvsd69zzGLYTBNpIaAl1HEALw_wcB
so this is computer only then?

Audio I/O​

The HD Express provides both stereo and 8-channel surround audio capture and monitoring.

The HD Express provides stereo analog audio recording, stereo S/PDIF digital input, plus support for eight channels of HDMI® embedded digital audio input. All told, you get 12 simultaneous channels of audio input.
For audio output, the HD Express provides eight channels of analog audio output on convenient RCA jacks, which you can connect directly to powered speakers for full 5.1 or 7.1 surround audio monitoring. The HD Express supports 8-channel embedded HDMI audio output, for a total of 16 channels of simultaneous audio output.
The S/PDIF digital input/output provides sample rate conversion, for trouble-free digital audio transfers.
No other HDMI interface offers this much audio connectivity and convenience.

• 12 channels of simultaneous audio input
• 16 channels of simultaneous audio output
• Supports all standard audio sample rates from 44.1 to 96kHz
• 8 x RCA analog outputs
• 2 x RCA analog input
• 2 x S/PDIF digital input and output with sample rate conversion
• 8 x HDMI embedded audio in and out
• Front panel headphone jack with dedicated volume control

 

[ClassicalSurroundFan]

here's one on eBay

https://www.ebay.com/sch/i.html?_nk...vPOGyLrHJ4mie0cFsvsd69zzGLYTBNpIaAl1HEALw_wcB
so this is computer only then?

Audio I/O​

The HD Express provides both stereo and 8-channel surround audio capture and monitoring.

The HD Express provides stereo analog audio recording, stereo S/PDIF digital input, plus support for eight channels of HDMI® embedded digital audio input. All told, you get 12 simultaneous channels of audio input.
For audio output, the HD Express provides eight channels of analog audio output on convenient RCA jacks, which you can connect directly to powered speakers for full 5.1 or 7.1 surround audio monitoring. The HD Express supports 8-channel embedded HDMI audio output, for a total of 16 channels of simultaneous audio output.
The S/PDIF digital input/output provides sample rate conversion, for trouble-free digital audio transfers.
No other HDMI interface offers this much audio connectivity and convenience.

• 12 channels of simultaneous audio input
• 16 channels of simultaneous audio output
• Supports all standard audio sample rates from 44.1 to 96kHz
• 8 x RCA analog outputs
• 2 x RCA analog input
• 2 x S/PDIF digital input and output with sample rate conversion
• 8 x HDMI embedded audio in and out
• Front panel headphone jack with dedicated volume control

I do not think this will work in standalone mode, and even if it did, you would still need an old enough computer to set it up. The people at MOTU are great and very responsive. I would ask the what the latest OS that is known to work with this is.

 

[DudeRocks]

Ok, Dude, here is the only device I believe ever to be sold that did what you want IF you can find one used and if you have an old enough operating system to run it. There is no non-computer way. MOTU.com - Audio I/O

Sadly that's backwards, need to go RCA -> HDMI. Good looking out though.
EDIT: There's another side of the thing, let me see...