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Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?

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Uwe KlimmeckCan I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 4, 2004 at 9:34:30 pm

Hello everyone !

I'm a video editor and no audio professional. That's why I have to ask.
My edit-room is inside a sound studio and I need to cable my SPDIF monitoring outputs (RCA-male) from the machine-room through balanced XLR connecting lines over to my edit-room and back to RCA.
Does somebody know how to adapt RCA-XLR-RCA with SPDIF correctly ?
Even if I'll have to solder my own apapting-cables -- I don't know the correct pin-configuration.

Anybody wise who can point me into the right direction ?

Many thanks

Uwe


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ThaxRe: Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 4, 2004 at 10:58:55 pm

Don't know, but SPDIF MIGHT require a 75 ohm shielded cable (think cable TV or FM antenna wire) for longer runs.
I know the digital audio outputs from DVD players to receivers use 75 ohm cable.

But it won't hurt anything at all to try the RCA-XLR-RCA route. If it works, go for it.

XLR's are wired with Pin 1 as the shield.
Pin 2 and Pin 3 are the 2 inside conductors.

So send the center conductor of the RCA to either Pin 2 or Pin 3, (or BOTH if you like) of the XLR (won't matter as long as you do the same on EACH end of the XLR run.
And connect the outer shield of the RCA to Pin 1 of the XLR

There are many of these RCA to XLR cables ready-made available from "Guitar Shops."
They are XLR plug on one end, a short (6') cable to RCA plug.
They arbitrarily are wired with either pin 2 or pin 3 as the conductor and virtually always use pin 1 as the shield.
So they should work for you.
Expect to pay about $10 to $20 for EACH adapter.
Remember you'll need one FEMALE XLR-to-RCA for one end and a MALE XLR-to-RCA for the other end.
You can also buy the parts at Radio Shack and solder your own set (but the cost is about the same anyway.)

Remember, if this works you're fine.
If not, you may need to run a length of 75 ohm shielded cable (adapted for RCA on each end.)


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Uwe KlimmeckRe: Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 4, 2004 at 11:11:02 pm

Thank You Thax,

I just wanted to ask a pro before I do something wrong. It will be for monitoring and some client VHS dubs.
The main programm will go in/out DigiBeta as SDI embedded.
So I"ll go for it and just try.

Best regards
Uwe from Munich


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halbRe: Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 8, 2004 at 8:01:39 am

whats spdif?


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Rob ForsytheRe: Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 8, 2004 at 2:00:33 pm

[halb] "whats spdif? "

Not bad, what's spdif with you?


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Mark SimpsonRe: Can I send SPDIF (RCA) via balanced XLR and go back to RCA ?
by on Jan 8, 2004 at 4:36:23 pm

[Rob Forsythe] "
[halb] "whats spdif? "

Not bad, what's spdif with you?"



LOL! Couldn't resist, huh?

S/PDIF stands for Sony Phillips Digital Interface

It's a common two channel digital audio format, recognizeable by it's use of the RCA connector.

Mark Simpson


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