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USB to SPDIF converters shoot-out : EMU 0404 USB vs. Musiland Monitor 01 USD vs. Teralink-x vs. M2Tech hiFace - Page 105  

post #1561 of 1712
Quote:

Originally Posted by jkeny View Post

 

The better impedance control on the line results in lowered reflections & hence probably lower jitter BUT is it not true that the attenuation also knocks down both the signal & the reflections & each round trip of the reflection is attenuated further. Is this not the same effect as a well terminated cable where less signal is reflected to start with & each round trip it is attenuated even more? A visual of reflectionshttp://en.wikipedia.org/wiki/Reflection_coefficient


Of course, it attenuates both the signal and the reflection. Who has tried to convince you of something else?

 

Any method that knocks down the reflection is beneficial. There are more ways than one. Some have the effect of also making a better resistive match. It isn't rocket science. Don't ask me why this isn't taught anywhere. Techniques like this are older than I am.

 

Jocko

post #1562 of 1712

OK, Pat "Jocko Homo" DiGiaccomo, are you saying you are not the Pat of Analog Research Techology here? http://www.audiocircle.com/index.php?topic=67762.0

 

I have made payments by cheque to you made out to Analog Research Technology 

 

This certainly seems to be more than just a company you do work for - why are you afraid of stating your position with this company?

 

As for the rest of your post I haven't a clue what you're talking about


Edited by jkeny - 6/17/10 at 7:10pm
post #1563 of 1712


 

Quote:
Originally Posted by punk_guy182 View Post

@Joseph K

@Jocko Homo

 

I have a good SPDIF cable. It is the Oyaide DB-510 (0.70meters). http://www.oyaide.com/e_audio/audio_products_files/dr_db-510.htm

I'd like to sell it on order to raise some cash for other audio gear and use this 10db BNC T-Pad (BNC male to BNC male) attenuator between the hiFace and the DAC. http://www.pasternack.com/product-75-OHM-BNC-ATTENUATOR-DC-TO-1-GHz-1-WATT-PE7009-10-71538.html

 

Is that a good idea? Or should I avoid using USB cables and stick with my S/PDIF cable?

 

What do you guys think? Which is more detrimental to SQ, S/PDIF or USB cables?

I don't know! It is probably as good or as bad as the next one. How it works in your system is not something anyone can gauge, unless they listen to it.

 

It does not need to be rated at 1 W. I know they make ones that cost $10-15 dollars.

 

I would advise using a pad with any transport/cable/DAC combo.

 

What does USB have to do with this? How are you going to connect to your computer? There has to be a USB something, to connect to.

 

Whether USB cables are a lot different.........I have not spent the last 20 years measuring them. I think it is also a flawed interface. Since there is a pull-up resistor on the RX end, it is not terminated, I can not see how it can be a great interface. It is simply not possible to have longitudinal balance, with this kind of set-up. With async transfer, it might be passable. I have not put enough time into measuring it, to be able to give a detailed analysis.

 

Jocko

 


 

post #1564 of 1712
Quote:
Originally Posted by Jocko Homo View Post



 

The people I do some work for do not appreciate you equating them to me.

 

I do not appreciate you telling everyone that I don't answer your questions, because the reply is over your head.

 

You are guilty of both.

 

Over here, we are on the same level. So, can't say I hide behind being Il Duce. When you learn to treat me in the same manner as you want to be treated, we will not have these problems. I doubt that will happen. I could be wrong. Go ahead: make everyone's day.

 

Jocko
 

It seems to me all the attacks are coming from you so it's rich for you to say I should treat you in the same manner I want to be treated. You are the one attacking me
 

post #1565 of 1712

Jocko,

 

In this tread, recently they were thinking about the possiblity to totally eliminate the SPDIF cable from the picture, using a longer USB one instead, and attaching the Hiface dongle right at the dac input by using BNC-BNC adaptors.

 

I don't know, was not thinking of it either. Though the fact that the Hiface exploits the high speed USB 2.0 capabilities, renders it potentially sensitive to bad USB extensions, it might not work with a bad cable.

I would not sell any SPDIF cables yet, would try first the attenuator. One should be able to get these for ~20-30 dollars max, with some insistence.

 

Ciao, George

 

 

post #1566 of 1712


 

Quote:
Originally Posted by jkeny View Post

OK, Pat "Jocko Homo" DiGiaccomo, are you saying you are not the Pat of Analog Research Techology here? http://www.audiocircle.com/index.php?topic=67762.0

 

I have made payments by cheque to you made out to Analog Research Technology 

 

This certainly seems to be more than just a company you do work for - why are you afraid of stating your position with this company?

 

As for the rest of your post I haven't a clue what you're talking about

First off, I do not reveal what companies I do design work for. Even to firms that hire me. AR-T is not the same as AR, which is who you think I really am. AR-T is an outgrowth of AR. The details of why it is that way is not something that concerns you.

 

(No, you sent a PayPal payment to AR, for something you claimed you never got. Not AR-T. You need to get your facts straight, and stop assuming "facts not in evidence".)

 

Again, "working for" is not the same as "owning". I may or may not be paid to do the work they need to do. Frankly, I would rather do "consulting", which is what I do. Not production, not dealing with customers, and damn sure not marketing.

 

You need to rent Monty Python and the Holy Grail.

 

Jocko
 

post #1567 of 1712

I already posted the price $12 from minicircuits - why double this price - shipping?


Edited by jkeny - 6/17/10 at 7:41pm
post #1568 of 1712

OK, Pat "Jocko Homo" DiGiaccomo, are you saying you are not the Pat of Analog Research Techology here? http://www.audiocircle.com/index.php?topic=67762.0

post #1569 of 1712


 

Quote:
Originally Posted by joseph k View Post

Jocko,

 

In this tread, recently they were thinking about the possiblity to totally eliminate the SPDIF cable from the picture, using a longer USB one instead, and attaching the Hiface dongle right at the dac input by using BNC-BNC adaptors.

 

I don't know, was not thinking of it either. Though the fact that the Hiface exploits the high speed USB 2.0 capabilities, renders it potentially sensitive to bad USB extensions, it might not work with a bad cable.

I would not sell any SPDIF cables yet, would try first the attenuator. One should be able to get these for ~20-30 dollars max, with some insistence.

 

Ciao, George

 

 


Well, it might work. A pad that connects the transport and DAC directly might work out really well. Again, depends on how it all goes together.

 

As for the USB, not my area of expertise. I wish I knew what the guy was thinking when he invented it. (He worked at Intel, right? That might explain a lot.)

 

Along with all the inherent problems with USB, it is very limited in how long it can be. Which is why a looooooong SPDIF cable can be useful. But, we already had that discussion, and the usual suspects moaned that we BS'ed them.

 

Jocko

post #1570 of 1712

Jkeny - yes, at these low prices shipping counts.. By the way, to give honor where it's due, the minicircuits "connection" was first brought up by fmak / stormsonic at the diyhifi thread.

 

Ciao, George

post #1571 of 1712

Ha!

 

I was present at several occasions last autumn when Marco Manunta presented / demonstrated to the public his little dongle. With an SPDIF cable waving across the room as long as 7-8 meters!

 

Ciao, George

post #1572 of 1712
Quote:
Originally Posted by joseph k View Post

Jkeny - yes, at these low prices shipping counts.. By the way, to give honor where it's due, the minicircuits "connection" was first brought up by fmak / stormsonic at the diyhifi thread.

 

Ciao, George


Unfortunately, I can't give them accreditation as I had found these attenuators at minicircuits before then!

 

 Jocko refuses to answer whether he is Pat from ART or not

 

He now says that a short SPDIF link (using attenuator) might work really well - tell us more - without the BS, please! 

post #1573 of 1712
Quote:
Originally Posted by jkeny View Post



It seems to me all the attacks are coming from you so it's rich for you to say I should treat you in the same manner I want to be treated. You are the one attacking me
 


Do I need to count all the posts at DIYHiFi where you complain about me? And some here. Probably on other forums.

 

When you stop complaining that I either lie or give you misleading answers, we won't have this problem. It is not my fault that you don't seem to understand my answers. There is not one thing I have said that is different from what gmarsh or Joseph K says. Yet, you mangle what I say, post it on other forums, and kvetch that I can not answer you. All the while, stirring up other folks in industry.

 

When you mangle what I say, on some other manufacturer's forum, and they conclude that I am an idiot, then the folks I do work for get awful mad.

 

Yes, you are guilty of this.

 

Jocko

post #1574 of 1712


 

Quote:
Originally Posted by jkeny View Post

He now says that a short SPDIF link (using attenuator) might work really well - tell us more - without the BS, please! 


Yes, it may very well work good. It depends on more than one factor, and you can not seem to grasp this simple concept.

 

You seem to have a lot of problems, with simple concepts.

 

If the attenuator is big enough, it would probably kick butt. Of course, the RX may not work. But, without actually having the system in question, there is no way to give a definitive answer. How hard is this to understand?

 

Jocko

post #1575 of 1712
Quote:
Originally Posted by Jocko Homo View Post




Do I need to count all the posts at DIYHiFi where you complain about me? And some here. Probably on other forums.

 

When you stop complaining that I either lie or give you misleading answers, we won't have this problem. It is not my fault that you don't seem to understand my answers. There is not one thing I have said that is different from what gmarsh or Joseph K says. Yet, you mangle what I say, post it on other forums, and kvetch that I can not answer you. All the while, stirring up other folks in industry.

 

When you mangle what I say, on some other manufacturer's forum, and they conclude that I am an idiot, then the folks I do work for get awful mad.

 

Yes, you are guilty of this.

 

Jocko

Ok, you are referring to SPDIF cable length issue. I said I prefer the short cable approach as long cables had to be a special length which as Gmarsh stated "pick a cable electrical length that's relatively prime to the wavelength". This requires knowledge of the cables specification & calculations to determine these acceptable lengths. So I don't find this as acceptable as using a short cable below a certain length.
 

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Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › USB to SPDIF converters shoot-out : EMU 0404 USB vs. Musiland Monitor 01 USD vs. Teralink-x vs. M2Tech hiFace