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

Twisted Pear Superior quality electronic kits

Reply
 
Thread Tools Search this Thread
Old 7th April 2014, 04:48 PM   #511
clsidxxl is offline clsidxxl  France
diyAudio Member
 
clsidxxl's Avatar
 
Join Date: Sep 2012
Location: Strasbourg
Russ,Have you considered the NDK NZ2520SD http://www.ndk.com/en/products/searc...7929_1433.html ,excellent specification,but very very small.The CCHD-957 is very good ,I use it with the FIFO of Ian.
  Reply With Quote
Old 7th April 2014, 08:03 PM   #512
ChrisMmm is offline ChrisMmm  New Zealand
diyAudio Member
 
ChrisMmm's Avatar
 
Join Date: Jul 2005
Location: Aotearoa
Quote:
Originally Posted by clsidxxl View Post
Russ,Have you considered the NDK NZ2520SD NZ2520SD(OA / AV)/Crystal Clock Oscillators/NDK ,excellent specification,but very very small.The CCHD-957 is very good ,I use it with the FIFO of Ian.
And, dare I say it, the NDKs are a lot cheaper. Depending on how you source them of course. From what I have read performance is similar.

But this isn't a democracy, Russ makes the choice and I would abide by that.
  Reply With Quote
Old 7th April 2014, 10:23 PM   #513
PET240 is offline PET240  Australia
diyAudio Member
 
Join Date: Feb 2010
Location: Brisbane Northside
Regards the LCD and Russ looking at using the bbb to write to the registers on a dac(Buff III-refer earlier in the thread), could an lcd be connected via the spi bus? Or if a dac is connected that way can only one device be connected at a time?
Also, another software I used(mpdpup) would load two songs into ram(thats what I understood anyhoo), so when the first finished the second was ready to crank, the question I have is, could the sample rate and format be "read" by software and at end of song the dac registers could be changed if required to automagically be setup for whats coming next. I dont know delays or dramas, just spitballing.
An lcd isnt really necessary for this black duck, just my brain throwing ideas into the ether.

Russ, with the two clocks are we going to have a mclk u.fl term so we can run the buff synchronous if we desire? Be nice to have u.fl connectors for the i2s as I am looking at running through a fifo, though if you are reclocking on the cape this may not be at all necessary.

Thankyou again gents for your efforts, looking forward to hearing them!

Chuz,

Drew.
  Reply With Quote
Old 8th April 2014, 03:37 AM   #514
acko is offline acko  Australia
diyAudio Member
 
Join Date: Jan 2008
Location: Sydney, Australia
Quote:
Originally Posted by Nikon1975 View Post
I am a bit lost in this development. I'll have my BBB in two months, so I have to stick with the Rasberry Pi for the time being. I am enjoying it, using both the I2S and I2C to control the DAC. If there is interest I can share the results (that are kind of trivial) here or in a dedicated thread. What I am trying to do is to modify volumio to make it use I2C to control the volume. Now I manage to do it only with command line. Help is also appreciated.

Does the driver developed for BBB do the same ?

What's the final goal of the whole development ?

Thanks,

D.

Yes, agree, goals and clarifications needed!

This is a great project that Russ have initiated but we before we get carried away lots of development we need to look at it from other perspectives and the reasons for going about this way. My knowledge in Audio streaming is limited at the moment but reading between the lines the Embedded Audio Appliance is practically a duplication of established lifestyle products and I can see better systems out there in this regard.


But if Russ can come up with synchronous BBB cape then I am also in for it.

But then again if you already have Ian's FIFO this would make the 'cape' redundant and I reckon the FIFO is a better product for post processing. So for those who have an RPi and Ian's FIFO you practically have everything you need now for full sync operation onto ESS DACs. Plus VolumeIO, the convenience and performance is right in your hands now.

But the 'BBB Cape' can have other advantages (apart from being a compact add-on) that Russ could explain to us.

Sorry, I didn't mean to cast aspersions but I am just commenting from a technical point of view. Hope I can be proven wrong
__________________
AckoDAC Project
  Reply With Quote
Old 8th April 2014, 03:47 AM   #515
PET240 is offline PET240  Australia
diyAudio Member
 
Join Date: Feb 2010
Location: Brisbane Northside
Acko,

The only real downside is Ians FIFO doesnt do dsd, I have one of all his boards so am not dissing his efforts in any way. Since I am looking to record my vinyl in dsd I would like to be able to play it back natively in dsd as well.

Appreciate yoir thoughts and insights.

Chuz,

Drew.
  Reply With Quote
Old 8th April 2014, 03:51 AM   #516
BrianL is online now BrianL  United States
diyAudio Member
 
Join Date: Mar 2002
Location: USA
Building an open embedded audio applicance.
clsidxxl, ChrissMmm,

The NDK doesn't have close-in phase noise specs, and w/o that, it's hard to say whether they are worth messing with.
__________________
bel
  Reply With Quote
Old 8th April 2014, 04:03 AM   #517
acko is offline acko  Australia
diyAudio Member
 
Join Date: Jan 2008
Location: Sydney, Australia
Quote:
Originally Posted by PET-240 View Post
Acko,

The only real downside is Ians FIFO doesnt do dsd, I have one of all his boards so am not dissing his efforts in any way. Since I am looking to record my vinyl in dsd I would like to be able to play it back natively in dsd as well.

Appreciate yoir thoughts and insights.

Chuz,

Drew.



Thanks, all for this cape then.
Great work!
Of course since the cape isolates and improve the clocking scheme we would expect this to provide super audiophile quality or am I expecting too much for a product like this?
  Reply With Quote
Old 8th April 2014, 04:51 AM   #518
PET240 is offline PET240  Australia
diyAudio Member
 
Join Date: Feb 2010
Location: Brisbane Northside
I have a feeling Russ knows what people would be liking/wanting/requiring/dreaming/hoping for, so I would say he intends to the benchmark.......

Chuz,

Drew.
  Reply With Quote
Old 8th April 2014, 10:06 AM   #519
4est is offline 4est  United States
diyAudio Member
 
Join Date: Sep 2009
Location: Grand Rapids, Mi
If one likes their other products, we should have some faith that Russ and Brian will do it well. Russ made it clear that he wants this to be high quality in its first iteration.
  Reply With Quote
Old 8th April 2014, 01:45 PM   #520
miero is offline miero  Czech Republic
diyAudio Member
 
Join Date: Jun 2011
Location: Prague
Raw BBB is able to generate only multiples of 48kHz frequency using very poor clock. So it is usable neither for CD nor DSD.

Raw RPi can generate both frequencies, but it drops some ticks to keep frequency accurate on average. And it does not support DSD, neither it has ability to use better clocks so no bit perfect.
  Reply With Quote

Reply


Building an open embedded audio applicance.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tractrix in 1*Pi and 2*Pi revintage Multi-Way 21 26th August 2011 09:37 PM
PI Speakers Haknhendrix Multi-Way 1 13th November 2003 06:52 PM
What is 2 pi and 4 pi EternaLightWith Multi-Way 12 13th October 2003 01:28 AM
PI-Filter wuffwaff Solid State 39 3rd January 2002 01:05 PM


New To Site? Need Help?

All times are GMT. The time now is 03:49 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki