Go Back   Home > Forums > Source & Line > Digital Line Level

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

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 11th July 2010, 11:14 AM   #331
diyAudio Member
 
PTSOUNDLAB's Avatar
 
Join Date: Dec 2001
Location: FRANCE / TOULOUSE
Quote:
Originally Posted by 6h5c View Post
Hi Pascal,

Not that I know of. I guess you would need some extra 'glue' logic between the ASRC and the two DAC's, and a more sophisticated output filter. Using the original ezDAC board for that will not be easy.

Do you have experience with 1794 in mono-mode? The gain is only a few dB, do you think it will be noticeable? The spec's of the DAC are already very good and will probably not be reached in real-life applications.

Ray
Hello Ray

I don't have realy experiences with 1794 in mono mode. I just ear one DAC one day in this configuration (I don't remember it's name). But I work for a compagny which make sputtering targets for Texas Instruments . I'm just IT manager in the compagny, but one day, during a visit of product engineers from TI in our buildings, I had opportunity of discussing with them about BB 1794.
I use no oversampling DAC (AD1865 and TDA1541), I have a CS4397 but I was never convinced by 24 bits DAC compared to AD1865, not enough basses and impact in low medium and basses. I have a CS4397 but compare to AD1865 " la" audio note, it have less basses. The only 24 bits which convinced me was the Kenwood DP5090 I tweaked

When I discussed with TI engineers, they told me that if I wanted to try 1794 (they gave me 2) it's better to try in mono mode for what I want, because these DAC are very good in dual mode, but for what I want (basses and low medium, impact and detail improvment), it's better to try in mono mode.
So it's why I think of test in mono.

I'm not very familiar with DAC, I'm more specialized in Tube preamplifier/amplifier and analogic. So after having read a lot of things on EZDAC, Flea clock, and Ciuffoly page Ciuffoly page I decided to make a DAC with one PCM1794 per channel, Flea clock, and an outputstage with tube inspired by Broskie balanced/unbalanced output and a anode follower output stage like I used on my CS4397 (sorry it's in french)

The schematic of my project is here Schematic and the power supply here PSU
It will take a long time to make it because I can conceive the PCB, but I have difficulty to engrave it at home, but at the end I will share the result on my site.

If someone see errors, please let me know

Cordailly

Pascal
  Reply With Quote
Old 11th July 2010, 07:06 PM   #332
6h5c is offline 6h5c  Netherlands
One Seriously Addicted to Audio and Electronics
diyAudio Member
 
6h5c's Avatar
 
Join Date: Apr 2004
Location: Heerhugowaard
I see, no 'glue-logic' is needed with this DAC. The channel select pin is very handy. Your schematics looks o.k. as far as I can tell.

If making a PCB is difficult for you, why don't you try the stereo configuration first? The ezDAC is a very nice DAC, and the numbers in the datasheet are almost equal compared to MONO mode.

The ezDAC is miles ahead of that CS4397 DAC. I bought one too, from E-bay, modified it and it now serves as an external DAC for my computer :-). I hope that says it all, I think it is not very special. Maybe a tube-output will cranck it up a little bit, but it will probably not make the world of difference.

Regards,

Ray
__________________
Gonna buy my little girl a pink soldering-iron
The new DOS-CFP board is out!
  Reply With Quote
Old 21st July 2010, 09:43 AM   #333
diyAudio Member
 
Join Date: Sep 2004
Location: n/a
Default Ez DAC boards for sale

For sale: 2 unused / new main boards for Ez DAC v.1.5 + 2 PSU boards for Ez Dac.

More at For Sale

Wim
__________________
n/a
  Reply With Quote
Old 7th November 2010, 05:58 PM   #334
canute is offline canute  Denmark
diyAudio Member
 
Join Date: Sep 2005
Question Comparison Cambridge Azur Dacmagic vs. ezDAC ?

Hi

I am planing to build the ezDAC some day.

In Denmark we were so lucky that the Cambridge Azur DacMagic was at sale for quite a good bargain - and I was so lucky that my wife bought one for me.

Now I am currious to know if any of you - that has build the ezDac - ever had the the opportunity to compare it with the DacMagic ?

Best regards

Knud
  Reply With Quote
Old 7th November 2010, 07:19 PM   #335
PJN is online now PJN  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Pa, USA
Hi Knud,

I have built the EZDAC with some help from the good folks here on the board and I think that's it's a really nice DAC. I don't have a DacMagic to compare it to, but I also built an opus DAC kit from twisted pear based on the Wolfson chip. They are pretty close but I'd have to say that the Opus has the edge. The Opus was also twice as much to build.

PJN
  Reply With Quote
Old 20th May 2011, 12:30 PM   #336
diyAudio Member
 
Join Date: Feb 2009
Does anyone know if you can add source indicators to the ezDAC to indicate whether the source is 16 or 24 bit and what sampling rate it's receiving 44.1, 48, 88, 96 or 192?
  Reply With Quote
Old 20th May 2011, 12:43 PM   #337
6h5c is offline 6h5c  Netherlands
One Seriously Addicted to Audio and Electronics
diyAudio Member
 
6h5c's Avatar
 
Join Date: Apr 2004
Location: Heerhugowaard
That all depends on the capabilities of the input receiver. The CS8416 is used in hardware-mode here, so only limited functionality is available.

It has a '96kHz' pin (pin 16) that is high when Fs > 88.1kHz, that's all.

Regards,

Ray
__________________
Gonna buy my little girl a pink soldering-iron
The new DOS-CFP board is out!
  Reply With Quote
Old 25th May 2011, 08:38 AM   #338
diyAudio Member
 
Join Date: Feb 2009
When pin 16 goes high can it drive an led or will I need a transistor driver circuit and if so can anyone suggest a suitable circuit.

Regards

Peter
  Reply With Quote
Old 25th May 2011, 09:00 AM   #339
6h5c is offline 6h5c  Netherlands
One Seriously Addicted to Audio and Electronics
diyAudio Member
 
6h5c's Avatar
 
Join Date: Apr 2004
Location: Heerhugowaard
Hi Peter,

You need an NPN transistor for that. Any generic type will do, like the BC547. Connect the base to pin 16 through a 47k resistor, the emitter goes to GND. The LED needs a series resistor to set the forward current. This depends on the voltage you are going to power this curcuit with. LED + resistor are connected between the collector and the V+ source, this can be a local 3,3V or 5V.

Regards,

Ray
__________________
Gonna buy my little girl a pink soldering-iron
The new DOS-CFP board is out!
  Reply With Quote
Old 25th May 2011, 09:17 AM   #340
diyAudio Member
 
Join Date: Feb 2009
Thanks for that Ray. I'll play around with that at the weekend. I also notice that pin 15 is low when a valid input it connected. I assume this would require a similar circuit but with a PNP transistor.

Peter
  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
F3 Builders Thread Melon Head Pass Labs 501 1st December 2013 03:38 PM
EZDAC is singing now!!! ezkcdude Digital Source 217 11th December 2011 06:45 PM
A-X IP Issues (split from Builders thread) tomchaoda Pass Labs 107 16th October 2011 02:05 AM
ezDAC chipsets xaudiox Group Buys 0 27th May 2009 06:45 PM


New To Site? Need Help?

All times are GMT. The time now is 05:41 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