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post #541 of 783
Quote:
Originally Posted by Griploc View Post

I will also put up a link of a song rendered with and without the upgaded USB to show the head-fi community so they can judge to hear if an audible difference is there

If you can include the original too, that would be great. Recording multiple times (well, 2 would be nice at least) with each cable would be helpful as well.
post #542 of 783
Quote:
Originally Posted by mikeaj View Post


If you can include the original too, that would be great. Recording multiple times (well, 2 would be nice at least) with each cable would be helpful as well.

+1

post #543 of 783

Original, by that how do you mean? If I were to record something from scratch technically that would be the original.

 

I will record the same song twice from the ground up using each USB cable then bounce it down from protools with each USB.

 

My vocal microphone signal chain is a U87 ai connected to a SAA E-Series Mic cable (using a Cardas custom cable body with alchem XLR connectors)

I will use SW and or my Triton Extreme Keyboard for instrumentation (cabling is Mogami 2534 neglex gold with the Neutrik ends off because they actually yield frequency content and dynamic range) 

 

My Triton Extreme keyboard and iMac are both suspended from the desk using 1" by 2" rubber cork blocks (4 each, one on each corner) to reduce vibrations and thus cleaner sound.

post #544 of 783

 

 

Quote:

If I were to record something from scratch technically that would be the original.

 

I will record the same song twice from the ground up using each USB cable then bounce it down from protools with each USB.

 

 

Are you talking about providing multiple performances recorded with different cables in the chain?

 

I don't think that will provide much useful data for us here. 

 

Better for these purposes to use the same source file or recording, and then process it through. Then you can compare that source against the processed files to look for any influence the USB cable had. If you are providing multiple performances, there are too many variables to compare.


Edited by liamstrain - 12/1/12 at 12:54am
post #545 of 783
I will bring a stereo paired song i recorded mixed and mastered into protools and render it down with the three different USB cables. I will include the original song as the reference.
Edited by Griploc - 12/1/12 at 2:32am
post #546 of 783
Quote:
Originally Posted by Griploc View Post

I will bring a stereo paired song i recorded mixed and mastered into protools and render it down with the three different USB cables. I will include the original song as the reference.

I suggest you do what Mikeaj was recommending: record at least twice with the same cable. Make sure the recordings are not different when using the same cable.

post #547 of 783
By recording do you mean record a audio signal through the usb cables? That wont be possible because my usb cables signal path is only connected from my audio interface to my computer. If i were to render or bounce a audio file down that was previously recorded than that would be doable.
Edited by Griploc - 12/3/12 at 11:44am
post #548 of 783
Quote:
Originally Posted by Griploc View Post

By recording do you mean record a audio signal through the usb cables? That wont be possible because my usb cables signal path is only connected from my audio interface to my computer. If i were to render or bounce a audio file down that was previously recorded than that would be doable.

I'm not a audio engineer and I'm still learning, so don't know much about what it's meant by render or bounce an audio file down.

 

But I guess if you mean that you will send some kind of digital signal from point A to point B for each cable, then you might as well do it at least twice for each cable. Doing so should include unplugging and plugging. In other words, threat the repeat cable test as if you were testing another cable.


Edited by ultrabike - 12/3/12 at 11:59am
post #549 of 783
By render or bouncing down i mean having multiple tracks on a session 'rendered' into one stereo paired audio file
post #550 of 783
Rendering the session will be converted through my interface and passed through my usb cables into my computer
post #551 of 783
Quote:
Originally Posted by Griploc View Post

Rendering the session will be converted through my interface and passed through my usb cables into my computer

 

You've fed us some information in small bites. It would be better if you could summarize your protocol as follows

 

1. What is the fixed value that we start with (it must be verifiaby and exactly the same for all conditions) for instance the source such as a source file in a given format played back on a device

2. What is the role of the independent variable (i.e cable) 

3. How does the cable interact with the fixed value i.e does it connect between the source and the input of a PC

4. What happens next? Is the transmitted signal recorded using some software - how do you account for random variation between multiple recordings of the same signal. When you digitally capture an analog signal you get variation from trial to trial. With a digital to digital capture this is less likely but you still need to make sure you know how much random variation there is. In my cable trials I recorded signals from each cable 10 times and could average out variation. I'd recommend a similar approach. This also involves extremely careful cropping and trimming of recorded samples. 

5 Assuming there are no big random variations how will you measure the differences between the two conditions.

6. If you are going to DBT samples I suggest no less than 15 trials

7. Will you be posting short (fair use ) samples for others to evaluate ?

 

The overarching principle is that only one variable is changed at a time and all other variables remain the same, easier said than done.... 

post #552 of 783

Getting to this thread pretty late with my own anecdote. Been some interesting reading!

 

Got a pair of HifiMan HE-400s for Christmas and immediately began hunting up amps and DACs. Landed on the Schitt Magni amp and Modi DAC. Jason Stoddard was great about answering questions and not trying to sell me stuff I didn't need. Very appreciative.

 

About halfway through this thread I said "Screw it...I wonder what a manufacturer thinks about USB cables?"  This is what he said:

 

"You should use a true USB 2.0 rated cable. Other than that, it doesn't matter, as far as we're concerned--except that expensive audiophile cables are usually 100% garbage, and cause problems (dropouts, garbled audio, etc) with USB input."

 

Good enough for Jason, good enough for me.

 

Thanks for the great read!
 

post #553 of 783
Quote:
Originally Posted by robilmc View Post

Getting to this thread pretty late with my own anecdote. Been some interesting reading!

 

Got a pair of HifiMan HE-400s for Christmas and immediately began hunting up amps and DACs. Landed on the Schitt Magni amp and Modi DAC. Jason Stoddard was great about answering questions and not trying to sell me stuff I didn't need. Very appreciative.

 

About halfway through this thread I said "Screw it...I wonder what a manufacturer thinks about USB cables?"  This is what he said:

 

"You should use a true USB 2.0 rated cable. Other than that, it doesn't matter, as far as we're concerned--except that expensive audiophile cables are usually 100% garbage, and cause problems (dropouts, garbled audio, etc) with USB input."

 

Good enough for Jason, good enough for me.

 

Thanks for the great read!
 

 

I'm hugely impressed by Jason Stoddard.

post #554 of 783
Yep! No Schitt.
Edited by Mambosenior - 1/12/13 at 6:27pm
post #555 of 783

i have had TWO dh labs silver sonic 5m usb cables, both of them does not work correctly, lots of cracks and pops all over the music.... all fine with my 5m supra usb cable that is 5 times cheaper then dh labs cable. any ideas what could be wrong with dh labs cables ?  dh labs are silver coated, supra is tin coated copper.

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