Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Open-source USB interface: Audio Widget
Open-source USB interface: Audio Widget
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 6th January 2012, 10:52 PM   #861
UnixMan is offline UnixMan  Italy
diyAudio Member
 
UnixMan's Avatar
 
Join Date: Apr 2005
Location: L'Aquila, Italy
Quote:
Originally Posted by Onvinyl View Post
It got regconized and plays in linux, but only in uac1-mode (24/48 green led lit)
why UAC1 only? old kernel?
__________________
Quote:
"We should no more let numbers define audio quality than we would let chemical analysis be the arbiter of fine wines." N.P.
  Reply With Quote
Old 6th January 2012, 11:14 PM   #862
rsdio is offline rsdio  United States
diyAudio Member
 
Join Date: Feb 2008
Location: Seattle
Quote:
Originally Posted by johnm View Post
To any of you interested in the subjective sound quality assessments of the Widget, I've now added a pair of 470uF 16V SEPC caps for C21/C31. I have also added a 100uF Elna Cerafine to C15 position. This is still using my external (but pretty basic) 5V PSU
Nice report, John. Thanks.
  Reply With Quote
Old 7th January 2012, 12:29 AM   #863
Onvinyl is offline Onvinyl
diyAudio Member
 
Onvinyl's Avatar
 
Join Date: Aug 2002
Location: Germany
Quote:
Originally Posted by UnixMan View Post
why UAC1 only? old kernel?
Old news. I managed to switch to uac2 now (thanks B. again).

I'm surprised. Subjectivly, it betters my RME ADI 2 by some margin!

Rüdiger
__________________
"I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog
  Reply With Quote
Old 7th January 2012, 12:48 AM   #864
rsdio is offline rsdio  United States
diyAudio Member
 
Join Date: Feb 2008
Location: Seattle
Quote:
Originally Posted by Onvinyl View Post
I'm surprised. Subjectivly, it betters my RME ADI 2 by some margin!
If you have access to test equipment, it's entirely possible that it betters the RME objectively as well.

I realize that RME has an excellent reputation, but I have seen their interfaces abused in ways that created more noise than less expensive MOTU interfaces. Well, not strict abuse, but marginal shielding resulted in 16 kHz noise on the RME that wasn't present in the MOTU. This was not the ADI 2 but the FireFace 400. I never did track down the reason for the 16 kHz noise, but it was present in the FFT and then disappeared when the MOTU 828 was swapped in to the identical 8-channel snake. Anyway, my point is not to disrespect RME with one example where perhaps the application was not ideal, but merely to point out that it's very possible that the performance is both subjectively and objectively better in certain conditions.
  Reply With Quote
Old 7th January 2012, 01:33 AM   #865
Onvinyl is offline Onvinyl
diyAudio Member
 
Onvinyl's Avatar
 
Join Date: Aug 2002
Location: Germany
Quote:
Originally Posted by rsdio View Post
If you have access to test equipment, it's entirely possible that it betters the RME objectively as well.

Well, I have not, and I do not hear if one dac has -126db noisefloor, and the other one say -132db.

I understand that both are quite different internally, and the RME of some age, so it makes sense. Just surprised it's so evident.

Rüdiger
__________________
"I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog
  Reply With Quote
Old 8th January 2012, 02:21 PM   #866
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
Quote:
Originally Posted by borges View Post
This thread is getting huge! And we like it. I've done a quick check for some highlights and appended them to the FAQ. Just follow my signature and scroll to the bottom.
Thanks Borges, it's clearer now.
  Reply With Quote
Old 8th January 2012, 04:01 PM   #867
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
Quote:
Originally Posted by rsdio View Post
Nice report, John. Thanks.
Ta

After I posted that comment I had a good long listen. Thought the sound had improved, I was still aware of a curious kind of 'thinness' to the sound at times. Like all the sound were cut out of cardboard! (not the best description but hey haha!). Removed C15 (100uF Cerafine) and the sound properly fleshed out again, with the added 'wallop' given by C21/31, and the external PSU.

So - leave C15 unpopulated is my advice if using an external PSU plus 470uF for C21/31 Sounds very 'analogue-like' now, with the immediacy of (good) digital. Using 'BitPerfect' for the Mac and it's all gelling very nicely indeed.

- John
  Reply With Quote
Old 8th January 2012, 06:43 PM   #868
borges is offline borges  Norway
diyAudio Member
 
Join Date: Dec 2003
Location: Oslo, Norway
Hi John,
could you perhaps go into some sort of schoolteacher mode and enter your mods with a red pen on the existing schematics?

Thanks for the modding work! I'm looking forward to uniting your and UnixMan's capacitor mods into an improved board.

Have you left the output caps open?

Bĝrge
  Reply With Quote
Old 9th January 2012, 01:03 PM   #869
oneoclock is offline oneoclock  Europe
diyAudio Member
 
oneoclock's Avatar
 
Join Date: Oct 2010
I built the 1Audio TL431 source and LED modification source.

Regarding VDD_XO, both TL431 and LED have produced improvements in Jitter respect to the original ADP151, but is slightly better in Jitter TL431 than LED source.

Now I try to see if there are any differences with LED source in the AVCC because have lower impedance than TL431 source?
  Reply With Quote
Old 9th January 2012, 10:40 PM   #870
oneoclock is offline oneoclock  Europe
diyAudio Member
 
oneoclock's Avatar
 
Join Date: Oct 2010
An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
  Reply With Quote

Reply


Open-source USB interface: Audio WidgetHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Async 192Khz USB - the SDR-Widget collaborative project SunRa PC Based 5 26th April 2011 07:38 PM
usb audio interface david12 Equipment & Tools 14 10th October 2010 03:58 AM
Cheap Audio Interface (USB?) to PC agm2003 Instruments and Amps 11 16th September 2007 08:48 AM
Open call for suggestions on Open Source DIY Audio Design gfergy Everything Else 1 15th April 2007 08:33 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 05:02 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki