exaU2I - Multi-Channel Asynchronous USB to I2S Interface - Page 106 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > exaDevices

exaDevices World-class audio devices for do-it-yourself projects from exaDevices

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd March 2012, 07:42 PM   #1051
DjSinae is offline DjSinae  Canada
diyAudio Member
 
Join Date: Feb 2012
The problem might be in the way a computer read audio cds...
Maybe a better computer cd-rom player made for audio..

Or I guess the emotional part comes from rega saturn internal components coloring the sound..

since your saying it was the BIII with saturn vs exa2UI with BIII, the dac should not be the cause..

since your not using all the EXA2UI 8 channel.. is there a reason to use this?
would you not be better with a XMOS usb2 2ch reference board.
Keep us informed on your testing.. did you verify the BIII i2s input voltage requirements etc..

you could always try audio-GD DSP-3 with i2s with BIII and compare the 2 usb-to i2s implementation
  Reply With Quote
Old 22nd March 2012, 08:19 PM   #1052
ccclapp is offline ccclapp  United States
diyAudio Member
 
Join Date: Mar 2012
Quote:
Originally Posted by johnmarkp View Post
I just finished hooking a exaU2I to a Buffalo III. ...The combo has a scary amount of detail with no one part of the spectrum dominating the whole. It just seems to lack some of the emotional involvement of my Rega Saturn / BIII setup. I am wondering if the exaI2U takes time to break in like analog components.

Also, what do people think about using higher cost USB cables? Right now I am just using a generic cable.

John
I know on my Mytek DACs, they benefit greatly from 100-200 hours of break-in. They get warmer and smoother. I send them a looped playlist and let it run for a week. The Mytek stereo192 uses the same DAC chip. There is an impossibly long thread on computeraudiophile.com on that unit and most users have repeated this finding (initially being a little disappointed in the 1st sound and then falling in love, its uncanny). However, since the BIII is not new, I think you are speaking of the exa card. I cant speak to that.

As to USB cable: there are many threads on that also at CA. The discussion runs the gambit. Personally with cables, I go to the high end of the low end ;-) Blue Jean Cables for most, but not USB/FW. Audioquest seems about right for me for USB. Below is a thread I started on this topic and got some reasonable recommendations...

Base Cables for Initial Setup | Computer Audiophile
  Reply With Quote
Old 24th March 2012, 12:32 PM   #1053
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by johnmarkp View Post
I just finished hooking a exaU2I to a Buffalo III. I am using JRiver as my server on a dedicated machine. The build was easy, the directions where spot on and the driver installed in seconds.
I am still trying to decide what I think of the sound. The combo has a scary amount of detail with no one part of the spectrum dominating the whole. It just seems to lack some of the emotional involvement of my Rega Saturn / BIII setup. I am wondering if the exaI2U takes time to break in like analog components. (those who do not believe in such things need not reply)
Also, what do people think about using higher cost USB cables? Right now I am just using a generic cable.

John
Hi John,

exaU2I is a very transparent device. There is no coloration, no makeup. The good recordings benefit from that. On the flip side you may be disappointed to discover that some disks are kind of ... lacking something. Have you tried any high-resolution downloads?

I haven't noticed any benefit from braking in the device. But definitely your brain needs some time to appreciate the new sound. After a week or so, try again your old setup and do some A-B testing.

-Best,

George
__________________
exaDevices.com | exaSound.com
  Reply With Quote
Old 24th March 2012, 01:14 PM   #1054
diyAudio Member
 
Join Date: Apr 2004
Location: Wisconsin
I have a few more hours of listening with the exaU2I / BIII combo. I will say this, it is absolutely ruthless. But not in the bleeding ears way that I normally think of when I hear that something is accurate and not colored. It is not bright or etched in any way. Its just all there with no added romance.

I am starting to think that everything else I have listened to highlighted and / or depressed some parts of the sound. With the U2I it is all there. I still hear a highlighted passage from before, it is just part of the mix now. The exa really shows how badly done reverb can ruin a recording. The exa has changed my thinking on the amount of data available with the CD format. Vocals are amazing, with detail and emotion like I have never heard before. It will be interesting to see what I think of this thing in three months. I run the BIII into a ARC Ref 5, ARC VS115 to Quad 988's. I use Kimber Silver wire for interconnects and Kimber monocle XL's. So the system is on the accurate, revealing side as well.
  Reply With Quote
Old 25th March 2012, 10:15 AM   #1055
diyAudio Member
 
Join Date: Jun 2004
Location: Bath, UK
Quote:
Originally Posted by exa065 View Post
exaU2U sounds much better than RME. When you optimize for one thing, you loose the other. Our ASIO driver is also very efficient, I can listen to 384 kHz on an Atom net-book.

DSP and bit-perfect are two incompatible consents. with exaU2I we offer bit-perfect.
The implication from what you say is that RME cards are not bit-perfect. Surely this is not the case?
  Reply With Quote
Old 25th March 2012, 07:14 PM   #1056
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by dickiegeorge View Post
The implication from what you say is that RME cards are not bit-perfect. Surely this is not the case?
In the context of the conversation RME was presented in a usage scenario with DSP processing. When DSP is applied, the result is not bit-perfect. Perhaps RME has a bit perfect mode. I wouldn't discuss it here. In general, when you consider a sound interface you need to take into account the following factors:
  • Bit perfect operation - this is influenced by the hardware, the interface, the drivers and the ability of the drivers to set the operating system in bit-perfect mode. In addition the player must support bit-perfect mode.
  • Jitter-free interface with the DAC. The DAC cannot be jitter-free, but the interface can.
  • Low noise operation - this requires filters, so external devices have an advantage here. Galvanic isolation will provide the ultimate noise suppression.
  • High-quality D/A conversion.
According to our customers exaU2I sounds better than RME. I haven't verified this claim. My explanation is that the combination of the listed factors makes exaU2I more successful for audiophile applications.

-Best,

George
__________________
exaDevices.com | exaSound.com
  Reply With Quote
Old 26th March 2012, 11:38 PM   #1057
diyAudio Member
 
Join Date: Jun 2004
Location: Bath, UK
Whilst I agree with you regarding the important factors for sound-quality, I can assure you when set to do so my RME Multiface DSPe will output bit-perfect. If not RME would never have obtained acceptance from mastering and post production studios, in which they are widely used.

You are correct that the demands for audiophile playback and audio production place very different restraints on design and implication, however bit-perfect is a relatively simple matter in both instances. I have come across $20 interfaces that manage it fine.

Last edited by dickiegeorge; 26th March 2012 at 11:43 PM.
  Reply With Quote
Old 26th March 2012, 11:53 PM   #1058
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by dickiegeorge View Post
Whilst I agree with you regarding the important factors for sound-quality, I can assure you when set to do so my RME Multiface DSPe will output bit-perfect. If not RME would never have obtained acceptance from mastering and post production studios, in which they are widely used.

You are correct that the demands for audiophile playback and audio production place very different restraints on design and implication, however bit-perfect is a relatively simple matter in both instances. I have come across $20 interfaces that manage it fine.
This is not a wishlist, it is the list of features for exaU2I. It is what we offer.
I guess you don't understand the issues around bit-perfect. It was discussed in previous posts in this thread, you can browse back and read it.
__________________
exaDevices.com | exaSound.com
  Reply With Quote
Old 27th March 2012, 06:54 AM   #1059
oyvine is offline oyvine  Norway
diyAudio Member
 
Join Date: Sep 2005
Location: Trondheim
Quote:
Originally Posted by exa065 View Post
...It was discussed in previous posts in this thread, you can browse back and read it.
This thread is 106 pages(!) It would be useful if you took the time to write a white paper or something to explain this issue in detail and what exaU21 does to overcome it.

regards,
ōyvin
  Reply With Quote
Old 27th March 2012, 07:22 AM   #1060
diyAudio Member
 
Join Date: Jun 2004
Location: Bath, UK
Quote:
Originally Posted by oyvine View Post
This thread is 106 pages(!) It would be useful if you took the time to write a white paper or something to explain this issue in detail and what exaU21 does to overcome it.

regards,
ōyvin
Yes, that would be interesting indeed...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ultimate USB to I2S interface sampler Digital Source 206 30th January 2012 03:45 PM
High Resolution Multi-Channel Digital Interface Brian Brown Digital Source 34 15th January 2008 06:48 PM
interface I2S with USB mermoz Digital Source 0 21st February 2003 10:34 AM


New To Site? Need Help?

All times are GMT. The time now is 09:02 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2