Ethernet over XLR works :3
@aurora
how far can it go?

@wolf480pl @aurora

I wouldn't be surprised if this goes far beyond the typical standards because XLR is shielded Coax which, I think, is superior to S/FTP.

The problem is probably the connector, not the cable length itself.

@wolf480pl @aurora

There is a reason the top of the line USB/Thunderbolt cables use miniature coax.

Okay, now I got an even more cursed idea: Ethernet over USB-C, but as in using only passive adapters.

@simon_m
sounds like a fun challenge, but in terms of practicality I think I prefer XLR connectors
@aurora
@simon_m @wolf480pl @aurora Not just the shielding, but it's also a balanced line: https://en.wikipedia.org/wiki/Balanced_line
Balanced line - Wikipedia

@rojun @wolf480pl @aurora

Yes, I meant balanced line. I couldn't remember the (English) term for this, so I just called it shielding :D

That should *significantly* reduce the noise level, the question that remains is the resistance.

@rojun @wolf480pl @aurora

The German Wikipedia goes a little bit more in-depth with the graphics:

https://de.wikipedia.org/wiki/Symmetrische_Signal%C3%BCbertragung#Anwendung_und_Theorie

Symmetrische Signalübertragung – Wikipedia

@simon_m
so both XLR and high-end USB3 would be Symmetrische Übertragung, differenzielle Signale?
@rojun @aurora

@wolf480pl @rojun @aurora

no, USB does not do symmetrical signalling.

so probably

TP < coax < symmetric signalling < the "star quad" which until today didn't know exists

https://hachyderm.io/@MrDOS/116008383767747811

Empterdose (@[email protected])

@[email protected] @[email protected] @[email protected] Good microphone cables are “star quad” (https://en.wikipedia.org/wiki/Star_quad_cable). I don't think I've ever seen coax XLR.

Hachyderm.io

@simon_m @wolf480pl @aurora @rojun @MrDOS ooooh!

Also, one star quad would easily suffice for 100 Mbit/s.

@simon_m
oh, because the super-speed pairs are either a twisted pair in the same shielding as all the other twisted pairs, or they are two individually shielded coaxes, and not a twinax?
@rojun @aurora

@wolf480pl @rojun @aurora

twisted pair or "normal" coax, with one in the middle and one around. Maybe shielded, but I don't think so.

@simon_m
I saw a Xray photo of one that had 2 coaxes for each superspeed pair, both + and - on the inside of each coax, and coax shields joined togeher at the ends and conncted to the ground
@rojun @aurora
@simon_m @wolf480pl @aurora Good microphone cables are “star quad” (https://en.wikipedia.org/wiki/Star_quad_cable). I don't think I've ever seen coax XLR.
Star quad cable - Wikipedia

@simon_m @wolf480pl @aurora also, if you use XLR cables for DMX, you’ll get even better results than with standard XLR for analog audio, since the XLR for digital purposes usually needs far better shielding and signal integrity as well.
@simon_m @wolf480pl @aurora Microphone cables just consist of a twisted pair of signal wires, with a concentric ground/shielding, so it's pretty much the same as a quarter CAT wire, just not optimized for the frequency range of ethernet, so I'd expect far worse performance.
@simon_m @wolf480pl @aurora Actually, using cat for audio over long distances reduces dropoff of high freqeuncies
@aurora for fast ethernet use XLR8R.
@aurora Exceptionally cursed, I love it.
@aurora Finally balanced network load. ​
@aurora manual MDX/crossover cable in less than 5 seconds!
@aurora this means you could run Art-Net over an audio snake... >:)
@aurora @aedancullen that is deeply disturbing.
Has most probably happened at a gig somewhere!
@aurora they asked if they could
But not if they should
And the one person who asked "why" was spartan kicked into the well in the center of town

@aurora are there preinstalled shrink tubes on the cable in case it breaks somewhere or sth?!

If yes that's sooo good, I wish more cables had that

@henry_null according to the manual those are intended for labeling
@aurora this looks nicely built. The adapters I build look less shiny
@TheConstructor apparently they are around 30€ each which is honestly pretty cheap for looking that nice^^
@aurora it seems I paid around 50€ total in 2010 at Thomann for the DIY-parts, but I didn't manage to get the stuff into a nice housing, because the connector-panel of the EtherCon-ports was too big. Haven't used them much either, but back then I had a yearly event at a location with many XLR-lines and almost no ethernet-lines…

@aurora is that a fidget cube on the left and if yes, is it mandatory for this setup?

(in all seriousness: wow, so cool!)

@jollysea yes it is, used it to cover a piece of tape on the dongle^ its just this one: https://www.printables.com/model/928-yet-another-fidget-infinity-cube-v2
Yet Another Fidget Infinity Cube v2 by Austin Vojta | Download free STL model | Printables.com

Printables.com
@aurora are those off the shelf adapters that are usually used to do the exact opposite? (I know, CAT and Ethernet are not the same, but for the sake of this shitpost I guess it's fine to say so).
@aurora I mean... XLR is just coax cable. Ethernet is made to run on coax cables.
This is just Ethernet over four twisted pairs.

@eragon @aurora

XLR is designed to carry analog audio over long distances where electrical interface in the audible spectrum is an issue. They solve it by sending an inverted signal alongside the normal one* so in theory if you double the number of connections and use that technique you could run a cable hundreds of metres long.

* other techniques are available.

@aurora …is this Dante
@aurora I'd like to put a tester on that, and hear how much it screams in pain. xD
@aurora This has been a fairly common solution for running more modern lighting & sound protocols across legacy infrastructure cabling in entertainments venues for quite a while I think!
@karyxdragon @aurora it’s more for sending multiple signals (DMX, AES/EBU, analog audio, etc) over one cable rather than four. Since it’s just a passive adapter that takes the Cat cable’s twisted pairs and breaks it out to four 3-pin XLRs pins 1 and 2. It seems like the shield is shared across all four XLRs.
@aurora Fun fact: The other way also works. You can send analog audio via XLR -> Cat5e -> XLR without issues (and without big audio loss).
@fx that is indeed what those adapters are actually designed to do^^
@aurora Cool, didn't knew that! I thought that these maybe are some sort of debugging adapters, idk. I didn't expect real equipment to exist for such use cases!
@aurora I love you’re using those adapters opposite of how they would likely be used in a broadcast or live event system.

@aurora I hope that you heard about EtherCON. =)

Cool, btw.