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

Vendor's Bazaar Commercial Vendors large & small hawking their wares

Shanti Dual LPS 5V/3A , 5V/1.5A
Shanti Dual LPS 5V/3A , 5V/1.5A
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 27th June 2019, 04:32 PM   #141
soundcheck is offline soundcheck  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: DUS
Quote:
Originally Posted by cdsgames View Post

But frankly speaking , you have been around for a while . You still think that RPIs are good for audio ? What did the Kali , Boss and others shown...its crappy at best.
Yep. I've been around for a while. And I've seen manufacturers failing and/or having their priorities wrong.

Meanwhile it's taking more then 10 years to fight USB associated issues.
All the countless USB gadgets and DACs I have around here remind of these awful 10 years.
Your new device proves it once more. USB is simply not an audio interface.


Quote:
Originally Posted by cdsgames View Post

Simply put...RPIs are not designed for audio but for a general purpose SBC. (and they do brilliantly at that)
That's funny. You got it wrong again.
That's a statement that pretty much applies to the entire computer audio area. Not any computer is designed for audio purposes.

It simply the job of the manufactures who're committed to produce audio interfaces to cope with this.

And the funny thing. Even the "crappy" RPI (via I2S) allows to have audio jitter performances in the femto seconds area, we see extremely low noise and THD values. Nope the RPI is not the issue here.


Good luck.

PS: Who needs DSD512!??
  Reply With Quote
Old 27th June 2019, 04:40 PM   #142
cdsgames is offline cdsgames  Canada
diyAudio Member
 
Join Date: Jun 2015
We appreciate having our 59$ SMPS Nirvana and expensive 159$ LPS Shanti compared with hi quality lab supplies .


Now , we do know how to measure the transients , but we need specialized test machines (automatic load) etc to fully measure.


Also , please note that no audio PS is providing this data ( IFI)


I understand that you keep ALLO at a higher standard ? Honestly , I kinda appreciate it .



As soon as I have some time , I will find a way to measure it and post it. Expect a long rant..



Now those "nasty spikes" on Nirvana at less than 1uV, are because of the nature of switching power supply and because of our "obsession" with noise.



In any SMPS those spikes will be buried into the noise floor.Nirvana noise floor is low enough to observe them. At last , the fact that we test in "real word scenario" (since most users do not have isolation transformers) , they are rather free to express themselves .



Linear PSU has a build it isolation transformer that make it more gentle (and still you can see the 20K)
  Reply With Quote
Old 27th June 2019, 04:48 PM   #143
orangecrush is offline orangecrush
diyAudio Member
 
Join Date: Jul 2010
This is all very exciting news, well done Allo!

Would there be any benefit in using the new USBridge with the Digione Signature if only using BNC?
  Reply With Quote
Old 27th June 2019, 05:06 PM   #144
cdsgames is offline cdsgames  Canada
diyAudio Member
 
Join Date: Jun 2015
Klaus


you are wrong.


Femtosecond jitter on a RPI ? Ohh no, not even ps . Nanosecond I think(know). We have the test data.



Now you are right on the USB. Give me i2s anytime, but you must understand that we make our products for everyone and not only for you. Many people here have USB DACs and they invested money and time into them . I think they deserve a good USB source .



We have done it with Digione , and new USBridge (in my opinion) will do to USB what Digione did on Spidif. It changed the game.


I will repeat. Noise is the enemy of good SQ. Noise , include in that definition distortion. And impedance ...



USBridge Sig. Audiophile RPI , has the lowest noise(see above difinition) that out test machines ever measured . The lowest noise on the i2s AND i2c. GPIO as well


You talk about RPI4 advancing on ethernet , me I talk about how I added CMCs on the Ethernet (because I dont think isolation transformers are enough check our Nirvana and Shanti both have 15mH CMC)



Is there here anyone that learned from past ? Look at what Greg is reporting (and he has what I consider a crazy system with a real obsession of noise) an RPI with linear power sounds..is wonderful the word Greg ? (and its an old RPI)


We listened .(but we added super caps .caps to lower the impedance on the rails and changed the layers of the PCB to 10)

Last edited by cdsgames; 27th June 2019 at 05:16 PM.
  Reply With Quote
Old 27th June 2019, 05:15 PM   #145
cdsgames is offline cdsgames  Canada
diyAudio Member
 
Join Date: Jun 2015
Quote:
Originally Posted by orangecrush View Post
This is all very exciting news, well done Allo!

Would there be any benefit in using the new USBridge with the Digione Signature if only using BNC?

This is a very complicated question.


Simple answer. Yes if you believe other people reports , NO if you think that test data(ap machine) shows the truth.


I think that SQ is a complex. Seems to me that even on digital streams some noise gets to the output. The thing I don't understand , is why even with galvanic isolation ICs , there are reports of increased SQ with a better source. Is it psychological bias ?



I dont know.


i2s/i2c signals on Usbridge Sig are much cleaner that RPI 3 (I dare include RPI4 but no data to back it up)
  Reply With Quote
Old 27th June 2019, 05:18 PM   #146
BryceJ is offline BryceJ  Canada
diyAudio Member
 
Join Date: Jul 2013
Location: Vancouver, BC
Quote:
Originally Posted by cdsgames View Post
Shanti boxes have arrived.



Note that we are changing the white screws to black


Final readings on Shanti on both outputs at full power draw.
Could you please post a picture of the other end of the power supply?
  Reply With Quote
Old 27th June 2019, 05:21 PM   #147
cdsgames is offline cdsgames  Canada
diyAudio Member
 
Join Date: Jun 2015
Beautiful BC
Attached Files
File Type: pdf shantifront.pdf (496.7 KB, 142 views)
  Reply With Quote
Old 27th June 2019, 05:28 PM   #148
BryceJ is offline BryceJ  Canada
diyAudio Member
 
Join Date: Jul 2013
Location: Vancouver, BC
Quote:
Originally Posted by cdsgames View Post
Beautiful BC
Wet BC today.

Thanks for posting the picture.
  Reply With Quote
Old 27th June 2019, 05:32 PM   #149
cdsgames is offline cdsgames  Canada
diyAudio Member
 
Join Date: Jun 2015
But its summer ..


Right in front of Nanaimo there is small island Gabriola. I spent 8 years on it. Good years.


It might make it equal ...we got a heat wave in EU , 39C where I live. Its not better..give me some rain

Last edited by cdsgames; 27th June 2019 at 05:35 PM.
  Reply With Quote
Old 27th June 2019, 07:52 PM   #150
soundcheck is offline soundcheck  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: DUS
Quote:
Originally Posted by cdsgames View Post
Klaus


you are wrong.


I don't think so.
Unless you tell me that your RPI audio interfaces are impacted by the RPI I2S quality.
As far as I recall you market your RPI audiointerfaces with jitter levels well below single digit picoseconds.
And that means that the actual SBC jitter is basically irrelevant.
The same logic applies to noise. What matters is what I see at the audio interface output.

I'm not commenting on Gregs wild fishing exercises.
The fact that split power supplies and additional stability on the rails can be a game-changer is known for a long long time (years).
For sure the transient capabilities of the PS and impedance conditions on the rails play a (big) role here.
Because , you know, that's what you'll actually impact if you wildly hook up Farrads of capacity to the power rails.
Unfortunately - as you outlined a couple of hours ago - you can't measure this transient behavior. That's a pity.
It might help to understand what's actually going on there.


Enjoy.

Last edited by soundcheck; 27th June 2019 at 07:59 PM.
  Reply With Quote

Reply


Shanti Dual LPS 5V/3A , 5V/1.5AHide 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
Buffer with Dual N-Ch Jfets and Dual Power Supply vdi_nenna Pass Labs 64 22nd April 2019 07:19 PM
Who wants 2SK194 Dual Jfets, C3381/A1349 Gr dual pair BJT? Junm Swap Meet 0 28th October 2015 03:17 PM
Dual Othorn / Dual modified F215AN Build Log Summary Alethia123 Subwoofers 62 17th September 2014 12:59 PM
50VA Toroidal Transformer Dual Primary 120/120 and Dual Secondary 15/15 KatieandDad Swap Meet 3 11th February 2012 06:26 AM
Dual turntable dual cs741q help needed steelyjoe Analogue Source 0 8th August 2010 03:25 PM


New To Site? Need Help?

All times are GMT. The time now is 03:40 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki