Posted on 03/01/2020 4:34:26 PM PST by ducttape45
Good evening fellow Freepers. This may seem like an odd request but it's something that I've wanted to ask here because though I know computer PCs, I don't know audio visual very well.
What I'm looking for is a device where an HDMI cable can be plugged in one side, and video and audio come out the other side separately. The audio output needs to be in the way of a 3.5MM audio port. The video output still needs be HDMI, or even Displayport and DVI.
The reason for this request is because the antiquated equipment in our A/V room does not support HDMI in any way (VGA and RGB), and the audio from an outside source can only come in the way of a regular 3.5MM audio plug.
To further complicate this scenario is the new projector we have does have inputs from all of the known video inputs from the last decade but it does not feed audio back into sound cabinet for broadcast to the auditorium.
Right now, if anyone comes in they have to run HDMI to the projector and audio from a 3.5MM audio jack to the sound cabinet. This works, but what I'd like to find is a splitter/converter as described above so all they to do is run an HDMI cable from their IT equipment to that device, which will in turn already be plugged into the projector and sound cabinet. Easy peasy.
Like I said, this is an odd request, but you don't know many have screwed up the A/V cabinet. It's not really their fault because the equipment is very old. I'm just trying to simply things for everyone.
Thanks for your help.
Wanted to know if you have a ping list this can go on. Thanks.
(no warranties expressed or implied)
Most of the converters go from HDMI to SPDIF and/or RCA connector audio.
here is one that might work for you:
You need an HDMI Audio De-embedder. HDMI goes in and out but the audio is separated such as the 3.5mm TRS, RCA or captive screw.
Sounds good, it’s going to be some kind of box that has the circuitry to dissect the HDMI signal. Also, I’d check into whether you’ll need HDCP (the digital rights management stuff) functionality for what you’re playing.
I got one from monoprice and it worked well. It was an hdmi spitter that could be reversed into a selector.
Cheap.
Go to Amazon and enter “hdmi to hdmi and 3.5mm” to the search and you’ll get a bunch of options. For example:
https://www.amazon.com/Optical-ROOFULL-Extractor-Splitter-Converter/dp/B01LL5RI3Y/ref=sr_1_1_sspa
If nothing else, you could run it through a cheap old TV that has a 3.5mm headphone jack.
(From someone who has the 3.5mm jack from their big 4K screen heading into a tube pre-amp, Carver amp, and then, ahem, large speakers, you get the idea)
eBay has many such boxes including some that will deliver analog audio output for audio surround sound for older receivers. It’s a big topic but you should have no trouble finding a splitter for less than $25.00
Best by far option is to come from the toslink (laser audio port) port on your newer equipment to a DAC (Digital to Analog Converter) and then feed the analog signal into your into your older stuff via RCA cables. You can actually get really really good audio quality that way. Here is a cheap one I run that has been great.
https://www.parts-express.com/dac-digital-to-analog-audio-converter-optical-—coaxial-—usb—180-998
Input: S/PDIF optical/coaxial 44.1 - 192 kHz • Sample rate: 44.1, 48, 88.2, 96, 176.4 or 192 kHz • Input: USB 1.1 compatible with 2.0 • Sample rate: 44.1, 48 or 96 kHz • Output: Stereo line level via 2 RCA jacks • Output impedance: 10K ohm • Output voltage: 1.35 Vrms • Headphone: 3.5 mm stereo jack • Headphone output power: 60 mW into 16 ohms, 30 mW into 32 ohms • Power: 5 VDC, 500 mA
I know my audio stuff. This is by far your best option. (I run this stuff with lossless audio from computer to old silver faced dual monoblock amp that weighs 70 lbs. (If the power supply is tiny your amp sucks)) It sounds flawless.
There is no setup. Plug it in and it works.
Short video on this thing.
https://www.parts-express.com/DisplayProductVideo.aspx?VideoID=1266&zpid=15167
I forgot... there is one thing to setup. Turn off dolby output on whatever you are bringing the sound out of and turn it to PCM. (Both communicate full surround info out but this thing needs the PCM format and not dolby format.)
Yes, that should work. I am using this one.....
https://www.amazon.com/gp/product/B07W6SW1FS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I split analog audio off of HDMI to send to amplifiers for other rooms. The digital HDMI audio is still there, too.
garyb, norcaljoe, and Mr.Blond all have what you need. The other ones people posted look to be RCA out only. Which is doable, but if you’re already setup for an 1/8” in, then don’t start adding more stuff if you’re not sure what’s going on.
jdsteel’s is an RCA out model, and LTGM in post 10 is overly complex and not even anything that you need - her thing doesn’t even have an hdmi input.
So just follow one of the first three’s links, or search for your own “hdmi audio de-embedder”. Amazon usually has cheap enough stuff, Newegg might have a good sale, and Monoprice is generally pretty cheap. Or, your local Fry’s or Microcenter should have one. Wally World/Target I doubt would.
Tech Ping
Thanks again!
Thanks for the suggestion. I like this one because it looks simple to utilize. So do a couple of others but it’ll come down to this unit or the one in Post 7. I’m just glad something like this doesn’t cost hundreds of dollars to purchase!
Good news. Amazon is THE place for any kind of adapter you could ever want. They’ve save my bacon a few times when doing an electronics setup or project.
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