Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Filter brewing for the Soekris R2R
Filter brewing for the Soekris R2R
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 12th March 2019, 12:02 AM   #1701
kray is offline kray  United States
diyAudio Member
 
kray's Avatar
 
Join Date: May 2018
Location: Denver, CO
Quote:
Originally Posted by TNT View Post
And the above with the same as before TNT44/48.

//
Hi TNT, are you working on adding the higher sample rates to yours?
  Reply With Quote
Old 12th March 2019, 08:12 AM   #1702
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Well, I 'm waiting for a new FW for 1121 so that I can do 4k taps. I think it will come with that.

//
__________________
More distortion to the people!
  Reply With Quote
Old 12th March 2019, 07:30 PM   #1703
kray is offline kray  United States
diyAudio Member
 
kray's Avatar
 
Join Date: May 2018
Location: Denver, CO
Quote:
Originally Posted by TNT View Post
Well, I 'm waiting for a new FW for 1121 so that I can do 4k taps. I think it will come with that.

//
Ah ok thanks for the update. I stay on the lookout for an update
  Reply With Quote
Old 16th March 2019, 04:48 PM   #1704
bc108 is offline bc108
diyAudio Member
 
Join Date: Oct 2014
Just reporting back that I have no pops and cracks now I have loaded 1.21 firmware.
When I was running 1.19 I was getting these on certain file formats.
I've also loaded the latest skr this thread has produced. Great work guys, really appreciate your efforts in getting this DACs boundaries pushed further.
  Reply With Quote
Old 17th March 2019, 05:34 PM   #1705
spikestabber is offline spikestabber  Canada
diyAudio Member
 
Join Date: Feb 2015
So one of my nc400 channels was injecting a good 400mv of DC offset back into the audio chain after it warms up, ended up having to re-adjust the pots on the ncore module to zero it, seems silly how they can drift out so much. That explained the random low volume performance which seemingly came and disappeared randomly. DC offset on the loudspeaker output was always 0 so its not something I expected.
__________________
Soekris dam1021-12v2 dual-mono balanced: https://imgur.com/a/HfMvZRD
nc400: https://imgur.com/iORCyna | TT2USB: https://imgur.com/a/p6OiS | HD800 | KEF R300

Last edited by spikestabber; 17th March 2019 at 05:38 PM.
  Reply With Quote
Old 18th March 2019, 02:54 PM   #1706
hop.sing is offline hop.sing  Europe
diyAudio Member
 
Join Date: Feb 2009
Location: Munich
Quote:
Originally Posted by spikestabber View Post
So one of my nc400 channels was injecting a good 400mv of DC offset back into the audio chain after it warms up, ended up having to re-adjust the pots on the ncore module to zero it, seems silly how they can drift out so much. That explained the random low volume performance which seemingly came and disappeared randomly. DC offset on the loudspeaker output was always 0 so its not something I expected.
But the dam swallows that with hiccup every once in a while and not audible steady distortion? I always wondered what will happen in the case of dc offset on the dam resistors....wasn’t brave enough to try....
  Reply With Quote
Old 18th March 2019, 04:57 PM   #1707
spikestabber is offline spikestabber  Canada
diyAudio Member
 
Join Date: Feb 2015
Quote:
Originally Posted by hop.sing View Post
But the dam swallows that with hiccup every once in a while and not audible steady distortion? I always wondered what will happen in the case of dc offset on the dam resistors....wasn’t brave enough to try....
When the amps were cold it wasn't an issue until after they finally come up to temperature, which takes a good hour. Over time they seem to have drifted a very large amount, as I've done this recalibration a few times in the past.
__________________
Soekris dam1021-12v2 dual-mono balanced: https://imgur.com/a/HfMvZRD
nc400: https://imgur.com/iORCyna | TT2USB: https://imgur.com/a/p6OiS | HD800 | KEF R300
  Reply With Quote
Old 18th March 2019, 08:53 PM   #1708
analog_sa is offline analog_sa  Europe
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Cascais
Filter brewing for the Soekris R2R
The amp is having a voltage offset at the input? Not familiar with Hypex, but this somehow sounds wrong. And this offset is user adjustable?
  Reply With Quote
Old 18th March 2019, 08:55 PM   #1709
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Yes they do - and yes, it is.

//
__________________
More distortion to the people!
  Reply With Quote
Old 18th March 2019, 11:43 PM   #1710
analog_sa is offline analog_sa  Europe
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Cascais
Filter brewing for the Soekris R2R
Is there not a simple buffer at the input? I gather it is not with fets...Sorry about the silly questions, just very surprised.

Edit: looking at the circuit now.

Last edited by analog_sa; 18th March 2019 at 11:46 PM.
  Reply With Quote

Reply


Filter brewing for the Soekris R2RHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Soekris' DAC implementations Eldam Digital Line Level 1112 11th January 2019 05:35 AM
Sold: Soekris DAM1021 R2R DAC Eldam Swap Meet 6 6th February 2015 07:23 AM
24-bit R2R DAC using miltiple 16/18/20-bit R2R chips Marek Digital Source 21 1st April 2011 09:05 PM
project brewing in my head, challenging, but seem like a good way to try new concepts lemans23 Multi-Way 26 11th October 2005 12:29 PM


New To Site? Need Help?

All times are GMT. The time now is 11:39 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki