Build thread for Diyinhk ES9018 DAC on Ebay - Page 15 - diyAudio
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 19th January 2013, 07:31 AM   #141
Account disabled at member's request
 
Join Date: Aug 2007
Quote:
Originally Posted by diyinhk View Post
asyn 100M clock with CM and XM is tested it will have lock issue.
lower than 40M clock is also tested it will have serious sound distortion problem, I don't know if it's call quantization noise.
Sync works faultlessly from the CM and I have no issues with the sound quality like this. I'm using OPA627 in the I/V and LME49990 in the buffer, playing 44.1Khz.

Unfortunately, when I play 88.2 Khz or higher, the sound is seriously distorted. Is this a setting problem for the CM asio driver / Windows 7 ? I'm using Foobar and the SOX resampler.

Thanks,

Tom

Last edited by KlipschKid; 19th January 2013 at 07:37 AM.
  Reply With Quote
Old 19th January 2013, 09:08 PM   #142
diyAudio Member
 
Join Date: Sep 2012
Quote:
Originally Posted by KlipschKid View Post
Sync works faultlessly from the CM and I have no issues with the sound quality like this. I'm using OPA627 in the I/V and LME49990 in the buffer, playing 44.1Khz.

Unfortunately, when I play 88.2 Khz or higher, the sound is seriously distorted. Is this a setting problem for the CM asio driver / Windows 7 ? I'm using Foobar and the SOX resampler.

Thanks,

Tom
The sync clock is connect from X49/GND and X45/GND (not from MCLK) to the es9018 X1/GND, remember to disable the local clock. And only 6631"A" version will work, 6631 will not work. If the old 6631 driver is installed, it must be uninstall and reboot, and install the latest 6631A driver

Last edited by diyinhk; 19th January 2013 at 09:12 PM.
  Reply With Quote
Old 20th January 2013, 04:38 AM   #143
Account disabled at member's request
 
Join Date: Aug 2007
Hi,

The problem was the ASIO driver. For over 48Khz, it only works at 24 and 16 bit. It can only do 32 bit for 44.1khz and 48Khz.

DIYINHK - if you have tried many clock frequencies with this DAC - which one do you think sounds best ? From the very limited tests I've done, I think an ultra-low jitter 90.3168Mhz would do well, with a logic gate to divide that to 45.1584Mhz and feed that back into the CM6631. Just an idea, probably not a good one, and I have no idea where I can source such a clock.

Anyway, it's working perfectly now and has been for hours. No issues at all and sound quality is better than I expected. I hooked it up to my hifi and found it has a very wide soundstage, with a warm signature. So thank you very much for making a good low-cost DAC like this !

Next for me to try is a WM8805 receiver, and then next week I'll start fitting better resistors etc.

I've put a lot of information on the first page of this thread too, aimed at beginners. Please have a look at it and PM me if any of it is obviously factually wrong.

cheers

Tom

EDIT - I have a question. The two boards have two ground connections - the I2S ground and the XO ground. Is this a potential ground loop ?

Last edited by KlipschKid; 20th January 2013 at 04:51 AM.
  Reply With Quote
Old 20th January 2013, 05:09 AM   #144
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Quote:
Originally Posted by KlipschKid View Post
Hi,

I've put a lot of information on the first page of this thread too, aimed at beginners. Please have a look at it and PM me if any of it is obviously factually wrong.
That's a very comprehensive set of information for us beginners.

Thanks
  Reply With Quote
Old 20th January 2013, 05:28 AM   #145
Account disabled at member's request
 
Join Date: Aug 2007
Quote:
Originally Posted by syklab View Post
That's a very comprehensive set of information for us beginners.

Thanks
Um, I meant building a DAC for the first time... I hope that didn't sound condescending .... anyway, you are definitely not a beginner...! But I do hope it is comprehensive enough for a "first-time builder" !
  Reply With Quote
Old 22nd January 2013, 12:22 AM   #146
Account disabled at member's request
 
Join Date: Aug 2007
Hi,

I thought I'd post an update now before I get busy with work again and this project starts to gather dust.

I've been trying different I2S sources with different clocks, and comparing that to a 384Khz dual AD1955.

So far, the only way I have managed to get as good or slightly better is to use a Crystek CCHD-957 and the WM8805 in async. I can say with some certainty that faster clocks sound better.

What is exciting about this - I'm still using the thick film resistors and TL1963 reg @3.3V. So it seems very likely that this DAC, with a CCHD957 clock, decent resistors and the Sigma11 reg @3.8V, will be something very special.

Does anyone know if a 90.3168 Mhz low jitter oscillator exists ? Maybe Guido Tent would be willing to develop one ? It could be divided into lower frequencies with a 74VHC163, and then used to synch with the I2S source.....

cheers

Last edited by KlipschKid; 22nd January 2013 at 12:31 AM.
  Reply With Quote
Old 22nd January 2013, 12:50 AM   #147
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
Quote:
Originally Posted by KlipschKid View Post
Hi,

...
So far, the only way I have managed to get as good or slightly better is to use a Crystek CCHD-957 and the WM8805 in async. I can say with some certainty that faster clocks sound better.

...
cheers
Thanks for the reports, KlipschKid,

What is the speed of your 957? 100 MHz CCHD-950 is also a low jitter clock...
__________________
www.hifiduino.wordpress.com
  Reply With Quote
Old 22nd January 2013, 12:53 AM   #148
Account disabled at member's request
 
Join Date: Aug 2007
Found this overpriced part :

FVXO-HC73BR-90.3168 Fox Electronics | FVXO-HC73BR-90.3168-ND | DigiKey

I have two 957 - the 24 and 22Mhz. They don't work well with the usb but they're great with the wm8805. Thanks for heads up about the 950 !

I've tried several of the Fox Xpresso and definitely faster is better, but lower phase noise is better still, so that 950 looks like the best choice ? Has anyone actually tried all of Crystek's to see if higher freq or lower phase noise is better ? i.e. compared the CCHD957 45m with the cchd950 100m ?

How's your build coming ?

Last edited by KlipschKid; 22nd January 2013 at 01:14 AM.
  Reply With Quote
Old 22nd January 2013, 01:34 AM   #149
Account disabled at member's request
 
Join Date: Aug 2007
Oh, I should say, the 22 and 24 Mhz are fine for 44.1Khz and 48khz but I get irregular unlock problems playing sacd or upsampled (96khz and higher) stuff.
  Reply With Quote
Old 22nd January 2013, 05:09 AM   #150
Account disabled at member's request
 
Join Date: Aug 2007
Thumbs up Some numbers

I changed the power supplies so the Sigma11 is only feeding the AVCC analogue section @3.76V, and the lt1963 has been bypassed.

I tapped the rectified but unregulated voltage on the Sigma11 and fitted an RC filter - 12R 5W and 1500uF - followed by an 7805A reg and a 820uF Nichicon PLG after that, and fed this to the wm8805 and the 3.3V adp151 which powers the DACs digital sections.

With the 125Mhz clock, the 12R drops 3.2V from the unregulated voltage of 10.7V, so that means the wm8805 + DAC's digital use 266mA with a 125Mhz clock.

At the other extreme, the 12R drops 1.51V from 11.8V = 126mA with a 22.5792Mhz clock.

I was really surprised by the difference so I double checked those voltages - they are correct. I know the wm8805 board uses 70mA so we have a 56mA to 196mA range just by changing the clock. This is at 3.76V AVCC, which is independent . 196mA is close to the ADP151 limit so the 125Mhz clock is risky.

The graphs on hifiduino show a linear relationship between clock freq and power, so it should be easy enough to work out what current demand each clock freq will require.

The sound quality is excellent with the Crystek and Sigma11. I'm very pleased and I'll be very interested to see what difference the resistors make, and I think I'll upgrade the 7805 to something like an adp7104.

Last edited by KlipschKid; 22nd January 2013 at 05:27 AM.
  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
BUILD THREAD - A New Take on the Classic Pass Labs D1 with an ESS Dac opc Digital Line Level 666 6th March 2014 08:49 PM
High Performance WM8741 Upsampling DAC New Version build thread (show 'n tell too) merlin2069er Digital Source 354 7th April 2013 08:51 PM
Pass D1V3 DAC - build thread spzzzzkt Pass Labs 224 8th December 2012 03:40 AM
Gamma-1 DAC build thread mattmcl Digital Line Level 8 20th January 2012 11:27 PM


New To Site? Need Help?

All times are GMT. The time now is 03:00 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