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Longhauling audio from TV using RG6
This thread has 9 replies. Displaying all posts.
Post 1 made on Monday May 14, 2018 at 04:13
crosen
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I need to send audio from a TV to an audio matrix approx 100' away. The TV outputs audio via S/PDIF optical and the audio matrix accepts analog audio.

In the past, I have done this with cat6, using an S/PDIF audio extender to get the audio signal down to the matrix, and then a simple DAC to convert the signal to analog.

However, the only cable I have to work with between the TV and matrix this time is RG6.

I would convert the S/PDIF signal from optical to coax at the TV, except S/PDIF over coax will only go 30' or so.

I think a possible solution is converting the S/PDIF signal to AES3 over coax, which I believe could go the distance. I've never done this, though, and cannot locate the required extender and DAC.

Thoughts?
If it's not simple, it's not sufficiently advanced.
Post 2 made on Monday May 14, 2018 at 06:59
buzz
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What format of "audio" are you starting and ending with?
OP | Post 3 made on Monday May 14, 2018 at 08:08
crosen
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Coming out of the TV will be 2 channel PCM, and going into the matrix will be unbalanced analog stereo.
If it's not simple, it's not sufficiently advanced.
Post 4 made on Monday May 14, 2018 at 09:07
highfigh
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On May 14, 2018 at 04:13, crosen said...
I need to send audio from a TV to an audio matrix approx 100' away. The TV outputs audio via S/PDIF optical and the audio matrix accepts analog audio.

In the past, I have done this with cat6, using an S/PDIF audio extender to get the audio signal down to the matrix, and then a simple DAC to convert the signal to analog.

However, the only cable I have to work with between the TV and matrix this time is RG6.

I would convert the S/PDIF signal from optical to coax at the TV, except S/PDIF over coax will only go 30' or so.

I think a possible solution is converting the S/PDIF signal to AES3 over coax, which I believe could go the distance. I've never done this, though, and cannot locate the required extender and DAC.

Thoughts?

I have used pieces like this, from Skywalker and it works.

[Link: amazon.com]
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
Post 5 made on Monday May 14, 2018 at 09:20
Ernie Gilman
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On May 14, 2018 at 04:13, crosen said...
I would convert the S/PDIF signal from optical to coax at the TV, except S/PDIF over coax will only go 30' or so.

What is the brand and model number of the device that sends an S/PDIF signal only thirty feet over RG6? I'd like to see the specs for myself.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
OP | Post 6 made on Monday May 14, 2018 at 09:43
crosen
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On May 14, 2018 at 09:20, Ernie Gilman said...
What is the brand and model number of the device that sends an S/PDIF signal only thirty feet over RG6? I'd like to see the specs for myself.

The limitation is not with a specific converter; it is with the S/PDIF standard itself.

See "Hardware specifications" at [Link: en.wikipedia.org].
If it's not simple, it's not sufficiently advanced.
Post 7 made on Monday May 14, 2018 at 17:03
Brad Humphrey
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Spec or no spec, you can go much further than 30 foot with S/PDIF 'EASILY'.

I posted many many years ago about having to use a piece of speaker wire (18awg) to send the coaxial S/PDIF signal from a DVD player to an A/V receiver. That was about 25-35 foot and it worked perfect... over a piece of speaker wire, no converter, just spliced in.

I have also sent the coaxial S/PDIF signal from a bluray over RG59 about 60-70 feet with no problem.

Since I have never personally went 100 feet on RG6 with that kind of signal before, I can't say 100% that it will work. But with all my experience working with it, I can see no reason why it shouldn't work.
Post 8 made on Monday May 14, 2018 at 23:52
Ernie Gilman
Yes, That Ernie!
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On May 14, 2018 at 04:13, crosen said...
I would convert the S/PDIF signal from optical to coax at the TV, except S/PDIF over coax will only go 30' or so.

On May 14, 2018 at 17:03, Brad Humphrey said...
Spec or no spec, you can go much further than 30 foot with S/PDIF 'EASILY'.

That is, the spec guarantees that the signal can go about 33 feet (10 meters, which is 10% more than you specced). But the signal MIGHT go much further.

Try it. If it works, propose to use it for the $#$ it cost you to try it out, or to stick with wiring per the protocol at its cost.

Brad also said
I posted many many years ago about having to use a piece of speaker wire (18awg) to send the coaxial S/PDIF signal from a DVD player to an A/V receiver. That was about 25-35 foot and it worked perfect... over a piece of speaker wire, no converter, just spliced in.

That shows robustness of the signal that's not even hinted at by the spec.

I have also sent the coaxial S/PDIF signal from a bluray over RG59 about 60-70 feet with no problem.

Since I have never personally went 100 feet on RG6 with that kind of signal before, I can't say 100% that it will work. But with all my experience working with it, I can see no reason why it shouldn't work.

That's why I say to try it. If it doesn't work, you have proof that the next best thing to meeting the spec simply won't work.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 9 made on Tuesday May 15, 2018 at 08:07
FreddyFreeloader
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We definitely need an all-in-one audio extender that both sends over CAT5e and converts to analog.

Anybody know of such an animal?
Post 10 made on Tuesday May 15, 2018 at 12:38
spoinkster
Long Time Member
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February 2013
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We have customers with this scenario regularly and use the combination below with great success.

Ethereal CS-D2D to convert optical to coax & CS-DAC to convert coax to analog.
"Enter clever comment here"


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