E-MU 0404 USB Modification? - Page 7 - 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 5th December 2010, 11:27 PM   #61
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
There is about the beats beween them are at 1kHz and harmonics at 2, 3, 4...
But when you are listening MUSIC, the beats beween notes are SUPPOSED to be there, so it is OK to be played. I wasn't reffering to those but the "extra" ones above 20kHz range. Listen to a sine shaped 14kHz signal and then one that is square.

Anyway, I am sure that LM4562 will be fine even with a 30kHz signal in the I/V or filter stages of a DAC.
  Reply With Quote
Old 12th December 2010, 06:44 PM   #62
FOXYE is offline FOXYE  Israel
diyAudio Member
 
Join Date: Feb 2009
Any idea how to bypass the internals regulator that powers the DAC and digital receiver with good psu?
  Reply With Quote
Old 14th January 2011, 09:08 AM   #63
diyAudio Member
 
Join Date: Dec 2009
Here is my recent post on the wiki for e-mu mod :

"
I would be very interested to see photos of the pcb in the article. It will ease understanding and help choosing this platform for mods.
I am thinking of removing all regulators and replace them by good ones, that is no switching regulators. It should be even possible to put batteries for some portions (li po seems to be the buzz).
Can we see the clock ? Is it possible to uprgade it with good ones ?
"

Anybody can post good photos of the pcb, or part of it please ? We need to see the different regulators and the clock.

Thanks for your work and attention.
  Reply With Quote
Old 3rd February 2011, 04:05 PM   #64
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Huge thanks to Audiodesign for suggesting those simple mods.

The improvement is almost unbelievable. I used an LL1674 connected as 1+1:2 and later on added an external regulated 5v. Both had a substantial, entirely positive audible effect. The only additional and relatively easy step i can think of is raising the 5v analog supply pin of the dac chip off the board and supplying clean regulated voltage directly to it with possibly some nice local decoupling. The dac is now comparable to my 1794 dac with resitor/transformer IV stage. Probably less natural sound with colder mids but surprising detail, separation and dynamics. Mid bass, as commonly the case with transformers is perhaps less incisive than it was with the opamps but acoustical bass instruments are really great. I just cannot believe something built so poorly can sound so well. Sadly, the board is really not mod-friendly and replacing the horror dc-dc convertors seems next to impossible.
  Reply With Quote
Old 3rd February 2011, 06:15 PM   #65
diyAudio Member
 
Join Date: Sep 2005
Send a message via MSN to audiodesign Send a message via Skype™ to audiodesign
Try different capacitors in the center input pin to change the sound.
  Reply With Quote
Old 3rd February 2011, 07:37 PM   #66
diyAudio Member
 
Join Date: Sep 2005
Send a message via MSN to audiodesign Send a message via Skype™ to audiodesign
New cheap project with EMU 0404 USB

Digital Room Correction
  Reply With Quote
Old 3rd February 2011, 07:59 PM   #67
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally Posted by audiodesign View Post
Try different capacitors in the center input pin to change the sound.
Almost the first thing i tried
  Reply With Quote
Old 7th February 2011, 08:50 AM   #68
diyAudio Member
 
Join Date: Dec 2009
I found a nice photo of the complete card.
Here it is : Modding a E-MU 0404 USB | Jacken's Blog
We can see some clocks, and it should be good to try more precise clocks, even with lipo power for good i2s before the dac.
Anyone tried to remove switching regulators to put thier own good regulated power ?
  Reply With Quote
Old 30th January 2013, 09:54 AM   #69
diyAudio Member
 
Artmaster's Avatar
 
Join Date: May 2004
Location: Kiev
Blog Entries: 1
Send a message via ICQ to Artmaster Send a message via MSN to Artmaster
hi all! do somebody have circuit diagramm of E-MU 0404 USB? digital output don't work of my card. Pity. I like it and would like to repair.
__________________
Artmaster live in www.artmaydan.org.ua
  Reply With Quote
Old 30th January 2013, 06:21 PM   #70
diyAudio Member
 
regiregi22's Avatar
 
Join Date: May 2009
Location: Madrid (Spain)
Has it ever worked to you or never had?
__________________
diyAudio, doing it as big as you can, JUST BECAUSE WE CAN!
  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
EMU 0404 Sound Card tripathdude Digital Source 5 23rd May 2008 04:46 PM
FS: E-mu 0404 USB external sound card Jack Hidley Swap Meet 2 14th March 2008 01:00 AM
X-over modification hermanho Multi-Way 1 20th February 2006 06:52 AM
Modding my EMU 0404: Can someone please verify bg4533 Digital Source 4 11th November 2004 09:32 PM
Help CDP-Modification wfmali Digital Source 0 1st June 2003 05:03 PM


New To Site? Need Help?

All times are GMT. The time now is 07:52 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