Les switchs audiophiles + ponts optiques

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[bbill]

(12-05-2019, 09:32 AM)Miramar2019 a écrit : De toute façon j'ai arrêté le réseau depuis longtemps.

mais tu as un avis assez tranché sur les switch... 

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(12-05-2019, 09:32 AM)Miramar2019 a écrit : Autant les claqué dans un autre lecteur réseau non?

la, il y a un certain bon sens !

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[Fledermaus]

Salut,
Histoire de détendre un peu l'atmosphère à propos de switch audiophile, un peu de hard data et de saine discussion :
https://www.audiosciencereview.com/forum...iew.10232/
Enjoy

[a supprimer merci]

Supprimé

[bbill]

(12-05-2019, 11:15 AM)Fledermaus a écrit : Salut,
Histoire de détendre un peu l'atmosphère à propos switch audiophile, un peu de hard data et de saine discussion :
https://www.audiosciencereview.com/forum...iew.10232/
Enjoy

oui, les conclusions de son test vont animer les discussions au coin du feu cet hiver :

"Measurements conclusively demonstrate that EtherRegen did not change jitter, noise or distortion of the DAC. It further had no impact on its clock speed, or output voltage.

What is that? You hear otherwise? Well, I tested it and there is no audible difference either. I suggest you repeat my test. If you do hear a difference, have someone switch cables behind your back. You can do this quickly, or wait days or weeks to switch. Just don't look and keep a log of 10 trials. If you can tell better than 8 out of 10 times that there is an audible difference with EtherRegen, then you have conquered the impossible!  

Now, I am not beyond paying more for something if it looks better, feels better, etc. Unless you have an upset stomach and like to use the EtherRegen as a hot water bottle replacement (don't laugh, I have done that with my laptop!), there is no such benefit. Even if there were, I would not pay $640 for it. $100 maybe. But $640?

Needless to say, I absolutely cannot recommend the UpTone EtherRegen. It seems to be designed by people who a) don't understand the architecture of streaming audio and hardware and b) didn't bother make measurements of said flaws before going to fix them. A problem was imagined, and then supposedly fixed."

[patatras]

(12-05-2019, 11:30 AM)paulw a écrit :

(12-05-2019, 08:10 AM)lArédien a écrit : C’est dingue quand même la lecture qui est faite de ce test, qui me semble quand même avoir le merite d’exister. 

Il n'y a pas 36 lectures à faire...

"It appears that differences are audible, but that they are small

Our conclusion for the time being: it is audible. But make sure the basics are right before you start working on this. It is a dot on the "i". No more."

Le contenu et le ton de ces conclusions est quand même très différent de certains retours fait sur ce forum ("effet waouh" par l'ajout d'un switch). C'est tout

Les résultats obtenus avec le bonn 8 dépendent beaucoup de la façon dont il est inséré dans le système :connection à une box ou pas, qualité de l'alimentation notamment 
Pierre

[a supprimer merci]

Supprimé

[Janacek]

(12-05-2019, 11:32 AM)bbill a écrit :

(12-05-2019, 11:15 AM)Fledermaus a écrit : Salut,
Histoire de détendre un peu l'atmosphère à propos switch audiophile, un peu de hard data et de saine discussion :
https://www.audiosciencereview.com/forum...iew.10232/
Enjoy

oui, les conclusions de son test vont animer les discussions au coin du feu cet hiver :

"Measurements conclusively demonstrate that EtherRegen did not change jitter, noise or distortion of the DAC. It further had no impact on its clock speed, or output voltage.

What is that? You hear otherwise? Well, I tested it and there is no audible difference either. I suggest you repeat my test. If you do hear a difference, have someone switch cables behind your back. You can do this quickly, or wait days or weeks to switch. Just don't look and keep a log of 10 trials. If you can tell better than 8 out of 10 times that there is an audible difference with EtherRegen, then you have conquered the impossible!  

Now, I am not beyond paying more for something if it looks better, feels better, etc. Unless you have an upset stomach and like to use the EtherRegen as a hot water bottle replacement (don't laugh, I have done that with my laptop!), there is no such benefit. Even if there were, I would not pay $640 for it. $100 maybe. But $640?

Needless to say, I absolutely cannot recommend the UpTone EtherRegen. It seems to be designed by people who a) don't understand the architecture of streaming audio and hardware and b) didn't bother make measurements of said flaws before going to fix them. A problem was imagined, and then supposedly fixed."

un peu plus loin....

gvl a écrit :I can't wrap my mind of how such a product could be conceived. I just can't believe the intention was to so blatantly scam the customers, after there are no hot-glued batteries and rattling off-the-shelf PCBs inside. Looks like a lot of effort was spent on the design. I tend to think this was plain ignorance of how OS networking stack works.

Le createur du test

amirm a écrit :Two ways:

1. John Swenson's day job is designing logic circuits for a networking company. Naturally he knows how to build a switch.

2. As I noted in the review, He and Alex are good at conceiving problems and then jumping to solve them. Problem is, they don't verify that the problem is real and therefore can't test if they have fixed anything. The result is product after product that does nothing for sound coming out of a DAC. The technical stories and theories though make enough sense to audiophiles to believe and hence "hear" improvements.

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et c'est pas fini -
et là c'est encore un autre débat....

dincus a écrit :Wait, sorry, I guess this is the answer. So the technical stories and theories make them imagine they are hearing things? I really am curious about this process.

amirm a écrit :When you make a change to your system, if you think there is going to be a difference, you will hear it. Your brain hyper focuses on the music and now digs deep to hear note decays, silent background, etc. All of a sudden a "veil" is removed. Detail becomes luscious and more "analog like." More lifelike.

Now being assured that the change made a sonic difference, you go back to the old setting assuming it is going to sound worse. And worse it will sound.

This has happened to me countless times. I too can swear there is an improvement and a big one. Then I realize that what I thought could not have been there as often, I realize I had not made any changes!

Play a piece of music once. Then go back and play it again without changing anything. But now focus on it to hear more detail. And more detail you will hear. You will hear it even though I just explained, and you know there can't be a change. Yet there will be.

The common retort is that people hear these differences when they are enjoying gear, not testing it. Problem is, they make the initial assessment when comparing gear, not enjoying music in a laid back position.

With the effect not being real, it will wear off. Then comes the next tweak/"upgrade" that triggers the cycle over again. Take notice that the people who "hear" such impossible things, have tried and swear by many impossible tweaks. The ethernet cable. The power cable. The stand. The footers. The tweaks to the OS. The special media player. Heck, even what SATA cable is in the computer!

They are living an illusion and simulation and not able to step out of it to see the reality. They could if they just listened to us once. Just once perform the same test blind. Alas, just like the movie matrix, they don't want to know. Knowing means eating crow. And eating crow is not what folks rather do with online reputation.

 
c'est pas cool mais c'est pas faux pour certains...

[bbill]

(12-05-2019, 12:02 PM)Janacek a écrit : Le createur du test

amirm a écrit :2. As I noted in the review, He and Alex are good at conceiving problems and then jumping to solve them. Problem is, they don't verify that the problem is real and therefore can't test if they have fixed anything. The result is product after product that does nothing for sound coming out of a DAC. The technical stories and theories though make enough sense to audiophiles to believe and hence "hear" improvements.

l'intérêt du test hollandais (des résultats statistiques) est de démontrer :
- qu'il y a des différences : le meilleur à une cote de 8,5 le moins bon a 6,4.. mais cela ne suffit pas..
- que les réponses sont souvent consistantes notamment pour le premier et le dernier du classement
on peut donc supposer qu'il y a un problème réel ? (contrairement au postula de amirm)