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Old 28th June 2012, 10:24 PM   #731
PET-240 is offline PET-240  Australia
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Hey Ian,

Another clarity question......if I want to use a CD spinner and a computer source into the FIFO, with a TDA1541 dac or a B III, what is recommended regarding clock frequency for the dual xo board?
Just getting a little confused with all the differing values being thrown about!

Thanks Muchly!

Drew.
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Old 29th June 2012, 12:59 PM   #732
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PET-240

In your case, I recommend 45.xxx and 49.xxx. The reason is there: higher MCLK is better for ESS DAC running at SYNC mode; while, 1541 is a NOS, doesn't care about the MCLK.
Nice weekend,
Ian
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Old 29th June 2012, 02:41 PM   #733
qusp is offline qusp  Australia
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Quote:
Originally Posted by andrea_mori View Post
Hi qusp,

are you using a miserable 44.1 khz source!?!?!?!?!?!?!?!?!?
I think we are a jurassic example in digital audio, whereas now almost all people use PC as a source.
Which DAC chip are you using?

Andrea
haha no, but I bought a crystek that was in my cart from some time ago by mistake, I was just confirming it works and is what i'm using. my source is multichannel USB-i2s from an SSD equipped i5 mac mini and capable of 8 x 32/176.xx + 192 or 4 x 32/384 + 352; I would say its you who is in the dark ages =)

i'm running a quad mono ES9012 based AKD12P ackodac (2 actually)

most of my content is still 44.1 other than stuff i'm making myself in logic as i'm not all that keen on buying upsampled music, fine if its natively hires. since even the 45mHz clock wont cut it I decided to just leave it for now because

A. I have a beta release fifo that needs to be sent back for an update before its capable of full speed
B. I want a clock thats even better than the crystek
C. I'm waiting for the multispeed DSPLL board
D. I need multichannel for the main rig so fifo is fir now designated headphone duties. I dont have any decent speakers with passive XO
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Old 3rd July 2012, 12:44 PM   #734
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Quote:
Originally Posted by iancanada View Post
3, Although I left the I2S backdoor, but I didn't place a real connecter footprint on the PCB, only 4 SMT resistorís footprints. So I have to say the backdoor is not that perfect. You have to tap a 4P PH2.0mm connecter by yourself as the picture below. Does it work for you if you really need this I2S input backdoor?
Hi Ian,

This I2S backdoor seems really interesting for me. But to be sure to add the spdif board to my wish list, I need a bit more information on how to tap this I2S input. I've seen two smd resistors which form a square shape with four pads. There is also a led near this group (like the three other groups for ttl, opt...). So I need to put a square shape connector for I2S input ?
Of course some ufl connectors would have been perfect/marvelous...
Can you give us some more specifics about the best way to tap this input in order to make the right choice ?
Thank you for your work !
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Old 4th July 2012, 06:01 AM   #735
qusp is offline qusp  Australia
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hes already shown photos on where and how in previous pages
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Old 4th July 2012, 08:26 AM   #736
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I've seen the photos and in my message I explain what I saw, I need confirmation. I din't find the how.
So the only way I see is to solder coaxial and I don't see where to tap a ground.
That is why, since I am missing something, I post a question (after reading the posts).
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Old 4th July 2012, 09:34 AM   #737
PET-240 is offline PET-240  Australia
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Quote:
Originally Posted by iancanada View Post
PET-240

In your case, I recommend 45.xxx and 49.xxx. The reason is there: higher MCLK is better for ESS DAC running at SYNC mode; while, 1541 is a NOS, doesn't care about the MCLK.
Nice weekend,
Ian
Thanks Ian,

Might I ask best part supplier for crystek CCD957(I think?) just feeding youngster a bottle and the iPhone is a pita to find stuff on. Though I fear the wrath of qusp for asking.....

Thanks again!
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Old 4th July 2012, 10:10 AM   #738
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digikey and mouser sell them mate

dk link - Crystals and Oscillators | Oscillators | DigiKey

It comes down to size of your order and shipping cost as to which of those two is cheapest to aus at end of the day.
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Old 4th July 2012, 11:35 AM   #739
qusp is offline qusp  Australia
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Click the image to open in full size.

haha

actually i'm making an order at mouser tonight or tomorrow if you want me to add it
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Last edited by qusp; 4th July 2012 at 11:41 AM.
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Old 4th July 2012, 07:14 PM   #740
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Quote:
Originally Posted by lwif View Post
Hi Ian,

This I2S backdoor seems really interesting for me. But to be sure to add the spdif board to my wish list, I need a bit more information on how to tap this I2S input. I've seen two smd resistors which form a square shape with four pads. There is also a led near this group (like the three other groups for ttl, opt...). So I need to put a square shape connector for I2S input ?
Of course some ufl connectors would have been perfect/marvelous...
Can you give us some more specifics about the best way to tap this input in order to make the right choice ?
Thank you for your work !
Hi lwif

It's not difficult for a DIYer to assemble an connector for the additional I2S port except you can not remove the 4 SMT resistors.

I'm writing the steps now, will be posted together with GB II details. Of course U.FL connecotors are the better solution for signals,so I'm highly recommended them for FIFO output, but it's not a big deal as the input of FIFO .

Good luck.

Ian
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