Again you keep putting words in my mouth that is not what I said. I said that isolation works as a dielectric, and in case it needs clarifying the isolation is the plastic cover that’s used around copper cables.
Read up on it and talk to cable manufactures and then come back.
That’s insulation. Isolation is something else entirely (which, since you have discussed it extensively upthread, I would have thought you would have straight in your mind).
How can you hear bits? We ar talking about digital cables.
Maybe you can answer my often asked and never answered question. Why did all these effects only affect digital data with audio content and not data with word are excel files and not my online banking. Or could give a better cable my poetry in word files more depth? Or better question, why not, if these special cables can do all the wonderful things I hear in all these threats.
Correct, English isn’t my native language, I meant insulation. And insulation works as a dielectric which both change over time and affects the electrical properties of a cable. And if you truly are a physicist you should know that a current through a metal does change many things, some short term (like heat) and some long term.
The insulation used on ordinary wiring (I make no statement about audiophool cables) is invariably chosen to be some non-polar plastic precisely so that it doesn’t act as a dielectric.
We are not talking about changes of the data here, but can assume bit-perfect transfer.
A digital cable is in fact an analog cable where volt pulses are interpreted as a 1. But a lot happens in electrical circuits to interpret this, and a lot happens when data needs to be resent due to a bit-fault. And also, as all conductors some electronic noise will hitch a ride along the data and be picked up on the way.
So fewer errors and better handling of electronic noise will lead to a small increase in sound quality, which is why things like ethernet switches, ethernet cables, USB cables, etc can make an audible difference.
That just means it has a lower dielectric constant, but they will still change with current. I think the best plastic has somewhere around 2.3 as dielectric constant, and air has 1.3.
Do you really know, that you are speaking about.
I have really cheap router, switch and cables and my network monitoring shows 2 errors (2 packets had to be send again) in the last 90 days. How can I have fewer with expensive equipment?
Seems to me, like manufactures of audiophile gears try to solve problems that didn’t exist in the real world and unfortunately some people spread these claims and unsettle others with lesser technical knowledge.
That is a shame!
if this “lot happens” would in any form affect the transmitted data, no bank in the world would allow online banking.
Hm, maybe I should buy the cheapest cable I can get and make a lot of transaction. With a little luck enough happen to make me a millionaire 
Your claim is that the dielectric constant of the insulation changes over time (or in response to the current carried by the cable).
So … what does it change to?
A little useless to debate as long as you are stuck on the “bits-are-bits” argument. Read up on how digital audio works and what influences the sound quality besides the actual data.
While you are at it, try to understand why Roon suggests core, control and endpoint on different machines. Hint: its related.
The constant does not change, but charges builds up and affect the conductor it isolates. For many analog cables, this is the main reason why a cable burn-in is needed.
But you are the physicist, you should explain this to me 
Umh. Sorry. No.
“Charges build up” = induced DC voltage. Which manifestly does not happen.
Oh, I have read enough about it, get a master at the university and worked in that field for the last 25 years. But never read a simple prove about the mystic in digital audio that only affects audio and none of the other data transmitted with ethernet.
“core, control and endpoint on different machines” that I understand and it makes perfect sense. But not the horrible theories about the ethernet connections between these machines. If I read these it makes me wonder why the internet is able the work with all these big unsoveld problems with one meter long cables.
Think about this: today we are able to control a rover on mars, how can a simple audio submission be such a big problem that the big companys are not able to solve them and we have to rely on small audiophile manufactures.
OK, I admit fault in that I oversimplified my first response to cable burn in. Doesn’t invalidate the nonsense of the concept though.
Electron polarization, saturation, whatever. The point is that after a while, the dielectric material stops changing and will have an more or less constant effect on the conductor it insulates, which is partly why burn-in on a cable is required to get best sound.
This applies to network cables also, but personally I haven’t noticed any change in sound due to it, but others might if they have a more transparent HiFi system than I have.
The burn-in myth came from the past there tubes needs a burn-in. Transistors, cables and all other components in modern electrical device don’t need a burn-in. Or is your new laptop faster after two weeks of burn-in or did the numbers in you excel-files are more accurate after a burn-in period?
Seems like another thing in the digital world that only has effect on audio. Please explain, why did only audio benefit from burn-in?
Oh well, I tried, but time to take a break from this thread again
To some of the doubters here: if you wan’t to get as good sound from your HiFi as possible, you need to be a little more open minded and realize that what you don’t know far outweighs what you do know!
But above all: don’t be afraid to experiment and test your believes. Borrow a better USB cable or ethernet switch and test in your system. If it don’t give better sound just give it back.
That is poor and no, you don’t tried. Not a single answer to my questions, only the old “try it for yourself”.
Hmm, If only we could put audiophile amateur scientist/engineers/subjective folks in charge of solving COVID-19 issues. 