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 7th July 2012, 07:38 AM   #751
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
I wouldnt call the ackodac average, it already uses the same interconnects, well w.fl not u.fl (smaller but fits on the u.fl pads) it would be pretty difficult to optimize an ESS layout any further and would cost a heap more to DIY. even if I had Ians skills the value proposition still just wouldnt be there, for me.

Last edited by qusp; 7th July 2012 at 07:42 AM.
  Reply With Quote
Old 7th July 2012, 07:41 AM   #752
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by soundcheck View Post
Ian.

Why don't you built a DAC by yourself?

Instead of tweaking an average 3rd party product you should built your own DAC.

It's just a PIC and a DAC on top of your stuff. Shouldn't be such a big problem for you.
Isn't the only way to buy a TOL Sabre is via a contract so consumers only have access thru these board/kits ? Would be nice to see an Ian PCM1704 based DAC PCB as an alterative.
  Reply With Quote
Old 7th July 2012, 07:53 AM   #753
NicMac is offline NicMac  Italy
diyAudio Member
 
NicMac's Avatar
 
Join Date: Feb 2009
Lovely work Ian!

Quote:
Originally Posted by iancanada View Post
I hope so, as well as the D1 IV .
While waiting, try out the SEN I/V.
Beats everything else I have tried hands down
  Reply With Quote
Old 7th July 2012, 08:04 AM   #754
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
You can buy the chips as an individual in lots of 2 or more and you just have to ask for the datasheet these days, no NDA. if Ian was going to do the whole thing, integrated PSU, USB transport, fifo, master clock IV, MCU and DAC, then sure there would be reasons for doing that, but thats a heap of time and pretty huge cost for a small run or one off.

Regal, since its something that can just be easily done in a small enough time to do one just because someone else wants it, you know just as a favor, maybe you should design the 1704 dac if you want an alternative?

I simply cannot believe that you attempted to tell me that I was pressuring for a direction...

Nic, I already suggested the SEN as an option to Ian, think he had the same reservations as I do.

Last edited by qusp; 7th July 2012 at 08:09 AM.
  Reply With Quote
Old 7th July 2012, 08:07 AM   #755
diyAudio Member
 
soundcheck's Avatar
 
Join Date: Mar 2005
Location: DUS
Quote:
Originally Posted by qusp View Post
I wouldnt call the ackodac average, it already uses the same interconnects, well w.fl not u.fl (smaller but fits on the u.fl pads) it would be pretty difficult to optimize an ESS layout any further and would cost a heap more to DIY. even if I had Ians skills the value proposition still just wouldnt be there, for me.
Look.

If IANs reclocker ( or even less sophisticated approaches) causes as serious improvement on a DAC, that DAC can't be rated better than average.
I'd expect that a DAC manufacturer can do more then just adding standard parts on a board. The DAC (I2S) associated problems and challenges are known since years.
__________________
::: Squeezebox Touch Toolbox and more ::: by soundcheck
  Reply With Quote
Old 7th July 2012, 08:12 AM   #756
diyAudio Member
 
soundcheck's Avatar
 
Join Date: Mar 2005
Location: DUS
Quote:
Originally Posted by qusp View Post
You can buy the chips as an individual in lots of 2 or more and you just have to ask for the datasheet these days, no NDA. if Ian was going to do the whole thing, integrated PSU, USB transport, fifo, master clock IV, MCU and DAC, then sure there would be reasons for doing that, but thats a heap of time and pretty huge cost for a small run or one off.

Regal, since its something that can just be easily done in a small enough time to do one just because someone else wants it, you know just as a favor, maybe you should design the 1704 dac if you want an alternative?

I simply cannot believe that you attempted to tell me that I was pressuring for a direction, here you are pushing for a direction against the direction Ians going.

Nic, I already suggested the SEN as an option to Ian, think he had the same reservations as I do.
I think there is plenty of demand out there. Twisted Pear still runs their batch policy and each batch gets sold out.

With the reclocker IAN would have "the differentiator" in the pocket. What might be needed is a cooporation with Lucien with his WAVE-IO board for USB connectivity and galvanic isolation..
__________________
::: Squeezebox Touch Toolbox and more ::: by soundcheck
  Reply With Quote
Old 7th July 2012, 08:33 AM   #757
NicMac is offline NicMac  Italy
diyAudio Member
 
NicMac's Avatar
 
Join Date: Feb 2009
Quote:
Originally Posted by qusp View Post
Nic, I already suggested the SEN as an option to Ian, think he had the same reservations as I do.
Could you please share those reservations. Maybe on the SEN thread not to go OT.
Is it the usual "can't work because it does not have zero input impedance" argument, without having actually listened to it?
  Reply With Quote
Old 7th July 2012, 08:56 AM   #758
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
nothing with the sound, just the complications of the PSU and reference in a dac thats already full of PSUs and regs, i've already voiced the same concerns in the SEN thread more than once. I dont see it as positive to go over it again. its more an inconvenience than a problem, but it was enough for me to pull the pin given the size and complication of my dac build already

Last edited by qusp; 7th July 2012 at 09:15 AM.
  Reply With Quote
Old 7th July 2012, 09:00 AM   #759
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by soundcheck View Post
Look.

If IANs reclocker ( or even less sophisticated approaches) causes as serious improvement on a DAC, that DAC can't be rated better than average.
I'd expect that a DAC manufacturer can do more then just adding standard parts on a board. The DAC (I2S) associated problems and challenges are known since years.
erm not quite sure how to reply to that. the fifo doesnt 'improve' the ackodac, just works with it rather well, the ackodac dac board is nothing but the dac chip, optional clock (or u.fl header) plus good decoupling, with w.fl input for signal and u.fl for the clock on a multilayer teflon PCB, so it literally plugs right in as it is.

Last edited by qusp; 7th July 2012 at 09:16 AM.
  Reply With Quote
Old 7th July 2012, 09:12 AM   #760
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by soundcheck View Post
I think there is plenty of demand out there. Twisted Pear still runs their batch policy and each batch gets sold out.

With the reclocker IAN would have "the differentiator" in the pocket. What might be needed is a cooporation with Lucien with his WAVE-IO board for USB connectivity and galvanic isolation..
see, you are talking about a full blown commercial product, weve all already mentioned to Ian that it would sell, but you cant just mention something like that off the cuff.

Ian is obviously happy with DIY being a hobby, not trying to make a career out of it, we can presume he already has a career. hes not making money out of the fifo as it is at the current price, are you suggesting he makes a whole dac available at a similar price?

i've already said above it would perhaps present an advantage doing it all on one board or at least well integrated, but when there is already perfectly good solutions designed by others to use with what hes got already, the only reason would be money. I would be extremely surprised if it measured more than 1db better than what is possible already with modules. a proper and original well performing discrete analogue stage isnt a small undertaking either, I would say this is further out of Ians skillset than the USB.

Since you mention him, Lucien and Acko are already working together on a project, which could be interesting. interesting for others that is, i'm about done with dacs for quite a while I think and I cant justify building another one

Last edited by qusp; 7th July 2012 at 09:23 AM.
  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
XMOS-based Asynchronous USB to I2S interface Lorien Digital Source 2043 17th April 2014 03:31 PM
exaU2I - Multi-Channel Asynchronous USB to I2S Interface exa065 exaDevices 1357 3rd March 2014 08:51 PM
DAC chip selection + I2S jitter questions drwho9437 Digital Line Level 2 26th July 2010 12:50 PM
Simple FIFO to I2S CPLD, for MCU players / reclocking KOON3876 Digital Line Level 21 19th September 2008 04:00 PM
asynchronous reclocking and low jitter clocks ash_dac Digital Source 3 8th February 2005 09:22 AM


New To Site? Need Help?

All times are GMT. The time now is 10:32 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