exaU2I - Multi-Channel Asynchronous USB to I2S Interface - Page 130 - 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 20th March 2013, 09:16 PM   #1291
diyAudio Member
 
Join Date: Nov 2006
Send a message via MSN to egberttheone
exaU2I - 32bit/384kHz Multi-Channel Asynchronous USB to I2S Interface
  Reply With Quote
Old 26th March 2013, 10:37 AM   #1292
diyAudio Member
 
Join Date: Sep 2006
I have encountered an issue when using exaU2I and JRiver for 6 channels (copying the signal from 2 to 6 channels for triamping). When there is signal on more than 3 channels I get loud crackling noises, and it gets even worse when I use more channels. All channels are clean when run separately, but it doesn't work when adding more channels.

Any ideas? Seems hardware/firmware related and not a JRiver problem. Something with the hardware buffer? I have the first version of the exa ASIO driver. Maybe I should try the newer dashboard version?
  Reply With Quote
Old 26th March 2013, 12:55 PM   #1293
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by Painkiller View Post
I have encountered an issue when using exaU2I and JRiver for 6 channels (copying the signal from 2 to 6 channels for triamping). When there is signal on more than 3 channels I get loud crackling noises, and it gets even worse when I use more channels. All channels are clean when run separately, but it doesn't work when adding more channels.

Any ideas? Seems hardware/firmware related and not a JRiver problem. Something with the hardware buffer? I have the first version of the exa ASIO driver. Maybe I should try the newer dashboard version?
Hello Painkiller, It is good to hear from you.

I've emailed to you your username, You can always request a password reminder on the login page of the exaDevices download site by using your username or email. Please download the latest drivers.

I don't think that this is a driver issue. The configuration that you are trying to setup was tested using Foobar and Allocator. Could you try to recreate the configuration described in this article - Using Allocator with exaU2I and Foobar 2000.
__________________
exaDevices.com | exaSound.com
  Reply With Quote
Old 26th March 2013, 01:27 PM   #1294
diyAudio Member
 
Join Date: Sep 2006
Thanks! I tried the newer driver, but with no difference. I'll try the Foobar + Allocator setup and get back to you.

The problem might also be related to timing issues, since the clock lines are daisy-chained to the dacs. Strange that all channels work fine on their own though.
  Reply With Quote
Old 26th March 2013, 02:34 PM   #1295
diyAudio Member
 
Join Date: Sep 2006
Ok, so the Foobar + Allocator combo resulted in the exact same problem. Clean when running two channels. Loud crackling noises when routing more channels.
  Reply With Quote
Old 26th March 2013, 02:44 PM   #1296
diyAudio Member
 
BrianDonegan's Avatar
 
Join Date: Dec 2004
Location: TPA HQ (The Basement)
Quote:
Originally Posted by Painkiller View Post
Thanks! I tried the newer driver, but with no difference. I'll try the Foobar + Allocator setup and get back to you.

The problem might also be related to timing issues, since the clock lines are daisy-chained to the dacs. Strange that all channels work fine on their own though.
Daisy chaining can result in strange reflections. They should all be home runs.
__________________
Twisted Pear Audio
  Reply With Quote
Old 26th March 2013, 04:01 PM   #1297
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
I did the experiment with Allocator on a single DAC in 8 channel mode.
__________________
exaDevices.com | exaSound.com
  Reply With Quote
Old 27th March 2013, 04:01 PM   #1298
diyAudio Member
 
Join Date: Sep 2006
Well, I've been doing some troubleshooting, and it's definitely a hardware problem. I have three stereo AD1865 dacs. When I disconnect the 5,6 data line, the two others work perfectly. When I disconnect the 3,4 data line, the others work perfectly together. But when I disconnect the 1,2 line, others don't work.

I guess it might be a wiring issue. Different data line lengths on line 3,4 and 5,6? Could that be the problem?
  Reply With Quote
Old 27th March 2013, 06:20 PM   #1299
diyAudio Member
 
Join Date: Sep 2006
Ok, a lot of back and forth here. It wasn't a data/clock wiring issue. I had shared the 5v supply with the one going to the dac. When I put in a separate 5v supply the problem disappeared. So exaU2I works perfectly with both the JRiver internal crossovers and with the Thuneau Allocator. Running 6 channels at 192kHz now.
  Reply With Quote
Old 27th March 2013, 06:43 PM   #1300
exa065 is offline exa065  Canada
diyAudio Member
 
Join Date: Feb 2011
Quote:
Originally Posted by Painkiller View Post
Ok, a lot of back and forth here. It wasn't a data/clock wiring issue. I had shared the 5v supply with the one going to the dac. When I put in a separate 5v supply the problem disappeared. So exaU2I works perfectly with both the JRiver internal crossovers and with the Thuneau Allocator. Running 6 channels at 192kHz now.
Congratulations!

You've mentioned that a similar issue was reported on the J River support forum. Could you send me the link? Perhaps your solution can be used to solve the other case.

Best,

exa065
__________________
exaDevices.com | exaSound.com
  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 04:45 PM
High Resolution Multi-Channel Digital Interface Brian Brown Digital Source 34 15th January 2008 07:48 PM
interface I2S with USB mermoz Digital Source 0 21st February 2003 11:34 AM


New To Site? Need Help?

All times are GMT. The time now is 03:53 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