Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz - Page 92 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Vendor's Bazaar
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Vendor's Bazaar Commercial Vendors large & small hawking their wares

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 24th January 2015, 07:57 AM   #911
diyAudio Member
 
Join Date: May 2005
Location: Melbourne
Blog Entries: 1
Quote:
Originally Posted by Eldam View Post
Is there any interest to some surgery on the USB cable to cut the the power and gnd return path (same wire Gnd that the signal return path?) when using external power supply to Amareno. In this case,we could keep the LDO which output drop is 3.3V and use a 5V before (any vias near the entry LDO volatge Pins or direct from the USB voltage pin ?

So double isolation if USB pcb : one for the PCB and the Soekris one ? Soren said the embeded isolation of the DAC should suffice ! More is better. My heart is balancing between a cheaper Amareno for that and a more sota one with isolation but longer to get ! As the isolation on an USB is at it output what could be the utility as the DAC has one at its entry ?

But I really ask myself because testimonials on the other thread (implementation) if a USB at 32/384 is better than a 24/44 TCPIP to SPIDF streamer ? Ok one said there is an isolator and recloking in the DAC boards ! But TCPIP and SPIDF are bit perfect in their transmission ! Does the streamed flux from the computer can be corrupted because the noise of the PC with a too Noisy USB pcb streamer ? Async USB does solve some problems in relation with the PC already, no ?

Sorry for the two cents questions
Hi Eldam,

I'd highly recommend reading (or rereading) the first three parts of the TNT Audio digital interfaces articles - starting here:
Digital Interfaces - An Introduction - Part 1.1 [English]

It is a pretty decent intro to the issues and the history. While it won't directly answer your questions it will help you understand what the issues are, and give you a framework which will help you make sense of all the information you are digging up. Most of what you are asking requires an basic understanding of the causes of jitter and the problems that people are attempting to solve with Async USB, Isolators, Fifos, clocks etc.

I'd make the observation that "Bit perfection" and "data corruption" are non-issues in working data interfaces. If these are a problem there is a fault in some part of the system like damaged cables or connectors etc.

cheers
Paul
  Reply With Quote
Old 24th January 2015, 09:57 AM   #912
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Quote:
Originally Posted by soekris View Post
Power is either +- 7-15V DC, preferable 9-12V DC or 2x 7-8V AC. It goes though a diode bridge so polarity doesn't matter. Connector is MTA156 type.
Can I read this as it is also possible to hook in DC on the 4 AC power inlet pins and that even in the DC case, polarity doesnt matter.

I never saw this done before...

//
  Reply With Quote
Old 24th January 2015, 10:02 AM   #913
alecm is offline alecm  Ukraine
diyAudio Member
 
Join Date: Feb 2011
Location: Kyiv
Quote:
Originally Posted by spzzzzkt View Post
For Amanero rev F. -> DAM1021

FSCLK -> LRCK (Frame sync = Left/Right)
CLK -> BCLK (Clock = Bit Clock)
DATA -> DATA
+3.3V output -> +3.3V
i have Sonore usb - i2s converter(SONORE USB Interface).
it has 4 outputs only
Bit Clock=Bit Clock DSD
Word Clock=Data L DSD
SData=Data R DSD
Master Clock=Master Clock

How it looks like the Sonore usb - i2s -> DAM1021 connection ?
  Reply With Quote
Old 24th January 2015, 10:34 AM   #914
diyAudio Member
 
Join Date: Jun 2004
Location: NZ
Quote:
Originally Posted by TNT View Post
Can I read this as it is also possible to hook in DC on the 4 AC power inlet pins and that even in the DC case, polarity doesnt matter.

I never saw this done before...

//
Yes. There are bridges there so the dc hookup polarity doesn't matter, current can only flow in one direction (the right direction) through the diodes.
  Reply With Quote
Old 24th January 2015, 10:36 AM   #915
diyAudio Member
 
Join Date: Mar 2003
Location: Zürich
Quote:
Originally Posted by TNT View Post
Can I read this as it is also possible to hook in DC on the 4 AC power inlet pins and that even in the DC case, polarity doesnt matter.

I never saw this done before...

//
Hi TNT,

have a look at this site
http://www.instructables.com/id/Self...ty-Protection/

I think this "trick" is being applied here.
__________________
my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!
  Reply With Quote
Old 24th January 2015, 11:44 AM   #916
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Cool - thanks!

//
  Reply With Quote
Old 24th January 2015, 12:30 PM   #917
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Quote:
Originally Posted by soekris View Post
Volume control goes to GND, +3.3V and Volume Pot input. In nothing connected it vill default to 0 db.
?
I feel a little unsure about the pot conection. Anyone care to do a simple drawing?

It shall play within 3 hours

//
  Reply With Quote
Old 24th January 2015, 01:43 PM   #918
soekris is offline soekris  Denmark
diyAudio Member
 
Join Date: Jun 2009
Quote:
Originally Posted by TNT View Post
I feel a little unsure about the pot conection. Anyone care to do a simple drawing?

It shall play within 3 hours

//
Shouldn't really need a drawing:

DAC GND -> Pot Min Pin (leftmost pin when viewed from front)
DAC Pot In -> Pot Center Pin
DAC +3.3V -> Pot Max Pin (rightmost pin when viewed from front)

I really look forward to listening reports....
__________________
Søren
  Reply With Quote
Old 24th January 2015, 01:53 PM   #919
smanz is offline smanz  Spain
diyAudio Member
 
Join Date: Jul 2008
Hi Søren.

My USB adapter have reclock and isolation on I2S signals.

Is possible bypass onboard isolator chip of dam1021?. How?

Thanks & Regards

Antonio

Last edited by smanz; 24th January 2015 at 01:58 PM.
  Reply With Quote
Old 24th January 2015, 01:54 PM   #920
TNT is offline TNT  Sweden
diyAudio Member
 
Join Date: Apr 2003
Location: Sweden
Thanks - thats OK!

//
  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
e18 DAC - 8 channels at 32bit /384 kHz exa065 exaDevices 30 29th June 2012 05:11 PM
384 Khz DAC? SunRa Digital Source 8 1st October 2009 11:14 PM
24 bit/192 kHz via USB? gentlevoice Everything Else 3 22nd December 2008 06:24 AM
sign magnitude DAC Bernhard Digital Source 0 30th January 2007 01:40 PM
24 bit / 192 kHz Tube DAC questions Overlord Digital Source 4 29th April 2003 05:14 PM


New To Site? Need Help?

All times are GMT. The time now is 07:06 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki