CM6631 usb audio interface .... any good ? - Page 28 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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 13th March 2013, 05:17 PM   #271
diyAudio Member
 
Join Date: Mar 2012
Quote:
Originally Posted by wklie View Post
As for Navyblue's 1st link, I can find it from taobao but there are almost no useful comments. Due to post #228, I'd recommend having the option of external power.

2nd link: my comments in post #261 are applicable.

I don't believe they are made equal due to different designs and components, and quality of soldering as many of them are hand made. I use the one in post #34 (with optional TCXO upgrade.)
Thanks.

As of now, I think the path of least resistance is the second link.

Is there a particular seller that has best/good reputation?

I don't rule out Taobao either, just haven't figure out how to make a purchase there.
  Reply With Quote
Old 13th March 2013, 06:46 PM   #272
diyAudio Member
 
terranigma's Avatar
 
Join Date: Feb 2007
Quote:
Originally Posted by wklie View Post
The seller got excellent ratings. I read all the comments - there are no negative comments (taobao usually has very few negative comments, but having absolutely none is most certainly good.). All comments about the build quality are good. Most reported improved audio quality but two said it (the narrow blue version) still cannot compare with CD players.

I think, but am not 100% sure, the differences among the three are:
- The narrow green version is the oldest
- The narrow blue version is newer and has coaxial output
- The more expensive wide blue version has coaxial, optical (but the photo does not show the connector?!), I2S output and may have better components.

0.1ppm TCXO upgrade costs RMB140 extra.
Thank you for good brief. I'm actually looking for a easy customizable (reg+oscillator modifications) layout and close-to-chip I2S tapping headers. Narrow blue version seems fit for me in this perspective.

For TCXO, should I prefer replace 12Mhz one first?
  Reply With Quote
Old 14th March 2013, 02:42 AM   #273
wklie is offline wklie  Hong Kong
diyAudio Member
 
Join Date: Feb 2013
Quote:
Originally Posted by terranigma View Post
For TCXO, should I prefer replace 12Mhz one first?
The RMB140 TCXO upgrade from this seller replaces both the 45.1584MHz and 49.152MHz only. Most of the sellers upgrade these two oscillators only (including the seller who sold my unit to me). Rarely do I see 12MHz TCXO upgrade being suggested as an option.
  Reply With Quote
Old 15th March 2013, 03:41 PM   #274
diyAudio Member
 
Join Date: Mar 2012
For this one here, I just noticed that there is no capacitor on it, but quite a few inductor.

Hi Fi CM6631A 192kHz 24bit USB 2 0 to Coaxial Optical SPDIF Convertor DAC Board | eBay

For this one, there is neither capacitor nor inductor.

24bit 192kHz USB to I2S SPDIF PCB CM6631 with Ultralow Noise 6 5UV Regulator | eBay

Can any of you more informed folks infer anything from it? Is it a good thing to be able to do without capacitor in this kind of circuit? Or is this some kind of cost cutting measure?
  Reply With Quote
Old 15th March 2013, 07:04 PM   #275
diyAudio Member
 
Join Date: Feb 2013
I think you don't see but the parts are correct. Second choice is best.
__________________
  Reply With Quote
Old 19th March 2013, 12:03 AM   #276
rade95 is offline rade95  United States
diyAudio Member
 
Join Date: Apr 2010
Location: Boulder, Colorado
Hi KlipschKid, I am trying to puzzle together your posts about diyinhk USB 192K CS6631A board and I am not sure why all your pictures have disappeared hindering this whole thread. I am trying to figure out how to make use of SPDIF out on that board because the pads are not solderable. The circuit should be there though, I think...Can somebody shed some light on this please. thanks
__________________
UGS pre, stock F5, PassLabs X2.5, Aleph P
  Reply With Quote
Old 19th March 2013, 12:04 AM   #277
rade95 is offline rade95  United States
diyAudio Member
 
Join Date: Apr 2010
Location: Boulder, Colorado
Here is the link to the board I am talking about:
Isolated 24bit 192kHz USB to I2S/SPDIF CM6631A PCB for ES9018 AK4399 PCM1794 | eBay
__________________
UGS pre, stock F5, PassLabs X2.5, Aleph P
  Reply With Quote
Old 19th March 2013, 02:26 AM   #278
Account disabled at member's request
 
Join Date: Aug 2007
I moved everything to a blog to avoid Qusp's constant irritation, and once the group buys are done, I'm off to diyhifi.

C-Media CM6631/CM6631A USB to I2S & SPDIF | myl8test
  Reply With Quote
Old 19th March 2013, 05:09 AM   #279
diyAudio Member
 
Join Date: Mar 2012
Quote:
Originally Posted by rade95 View Post
Hi KlipschKid, I am trying to puzzle together your posts about diyinhk USB 192K CS6631A board and I am not sure why all your pictures have disappeared hindering this whole thread. I am trying to figure out how to make use of SPDIF out on that board because the pads are not solderable. The circuit should be there though, I think...Can somebody shed some light on this please. thanks
I messaged the ebay seller recently. According to him/her, the output is only a few mA, and is good for a Toslink module. But for a coax output extra circuitry is needed.

As for KlipschKid, I wonder if you are taxing the SPDIF output? May be something like a 6:1 transformer to step down the V and beef up the I is more appropriate here? (assuming that such suitable parts exist)
  Reply With Quote
Old 19th March 2013, 05:31 AM   #280
rade95 is offline rade95  United States
diyAudio Member
 
Join Date: Apr 2010
Location: Boulder, Colorado
Quote:
Originally Posted by Navyblue View Post
I messaged the ebay seller recently. According to him/her, the output is only a few mA, and is good for a Toslink module. But for a coax output extra circuitry is needed.

As for KlipschKid, I wonder if you are taxing the SPDIF output? May be something like a 6:1 transformer to step down the V and beef up the I is more appropriate here? (assuming that such suitable parts exist)
Yep, I got the same reply from diyinhk, so I am no longer interested in trying SPDIF outputs on the board. Its not really intended to be used. Instead I will use the board for its real intended purpose: as a USB in, I2S out board @ 192KHz and as a MCLK source for the ES9018 board.
__________________
UGS pre, stock F5, PassLabs X2.5, Aleph P
  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
USB Audio Interface oodi Digital Source 6 30th December 2011 08:59 PM
usb audio interface david12 Equipment & Tools 14 10th October 2010 03:58 AM
Recommendation on good USB-SPDIF interface? kop89 Digital Source 13 2nd August 2008 08:51 AM
Cheap Audio Interface (USB?) to PC agm2003 Instruments and Amps 11 16th September 2007 08:48 AM
USB Interface Perfect?- Computer Audio fmak Digital Source 3 4th December 2004 11:24 PM


New To Site? Need Help?

All times are GMT. The time now is 04:24 AM.


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