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Ian asynchronous I2S and S/PDIF FIFO KIT group buy
Ian asynchronous I2S and S/PDIF FIFO KIT group buy
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Old 2nd April 2018, 12:47 PM   #2571
wlowes is offline wlowes  Canada
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As I understand if there is a trade off to consider. Oscillators have better phase noise specs at 22/24 than at 45/49. But you will be limited to the HD playback. If you only expect to play 44.1, then 22/24 will provide better sound quality. If you want full flexibility go with higher speed but you will lose some potential sound quality.
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Old 3rd April 2018, 05:48 PM   #2572
hellokitty123 is offline hellokitty123  United States
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Ok thanks.
I have another question about connecting an Amanero to the FIFO.
I'm having some difficulty figuring out how to set up the "slave" mode

Quote:
Enable slave controlled MCLK mode by driving SLEN pin on J8 to logic high.
How do I drive SLEN high?

Quote:
Connect XO selection signal from digital audio source to XOSEL pin on J8
What is the "XO selection signal"?

Also what do I do with the "slave jumpers" ?
It says to select between MCLK/1 MCLK/2 MCLK/4 MCLK/8 but makes no reference to what these are.

Lastly, do I really have to desolder the XOs from the Amanero?

Last edited by hellokitty123; 3rd April 2018 at 05:50 PM.
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Old 3rd April 2018, 08:54 PM   #2573
hellokitty123 is offline hellokitty123  United States
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I just realized I should probably be asking questions in the other thread. Ignore my last post.
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Old 8th April 2018, 10:28 AM   #2574
TirNaOg is offline TirNaOg
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Default clock issue

I hope someone can help shed some light on an issue I am having with my McDualXO board.

Today I added the XO adapter boards with new clocks (CCHD-957-25-45.1584 & CCHD-957-25-45.152) to the McDualXO board. Now both green lights are on beside the Clocks instead of one as before.

When I try to play music the 49.152 MHz flashes on and off and the 45.1584 MHz stays green, and no sound come through. I had been playing music (44.1 CD quality) with these clocks for weeks, temporarily set in place before this. I took off the 49 clock (as it was not needed for CD quality) to see if that might solve it but the same issue with both lights on and the 49 flashing even though the clock was removed.

Can anyone help with what the cause may be. I have double checked the solders, orientation of the clocks etc?
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Old 8th April 2018, 10:33 AM   #2575
wealas is offline wealas
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Did you solder any capacitors on the bottom of the XO adapter boards? They are supposed to take care of inductance created by the adapter pins.
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Old 8th April 2018, 10:33 AM   #2576
juancho is offline juancho  United Kingdom
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If you read Ian's documentation, you will see your second clock is not compatible with his list. That may well be the cause. When I used an incompatible clock I got noise but no music
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Old 8th April 2018, 10:39 AM   #2577
TirNaOg is offline TirNaOg
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Quote:
Originally Posted by wealas View Post
Did you solder any capacitors on the bottom of the XO adapter boards? They are supposed to take care of inductance created by the adapter pins.
Thanks for your swift replies wealas! No I didn't add any caps on the bottom. What size should I use?

I had the clocks temporarily in place before putting them on the XO adapter boards and they were playing for weeks without any trouble. Also the frequency of the 2 clocks match the ones that were supplied with the board when it came, and I just double checked on the McDualXO manual too.
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Old 8th April 2018, 10:40 AM   #2578
TirNaOg is offline TirNaOg
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Quote:
Originally Posted by juancho View Post
If you read Ian's documentation, you will see your second clock is not compatible with his list. That may well be the cause. When I used an incompatible clock I got noise but no music
Thanks juancho!
I had the clocks temporarily in place before putting them on the XO adapter boards and they were playing for weeks without any trouble. Also the frequency of the 2 clocks match the ones that were supplied with the board when it came, and I just double checked on the McDualXO manual too.
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Old 8th April 2018, 10:42 AM   #2579
juancho is offline juancho  United Kingdom
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Maybe it's a typo then but the clock should be 49.152 not 45.152 as you wrote
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Old 8th April 2018, 10:43 AM   #2580
wealas is offline wealas
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Quote:
Originally Posted by TirNaOg View Post
What size should I use?
I got this from Ian: "you will need a couple of 100n (104) capacitors"
I have no clue if the missing caps break the adapter or just make it sound worse...
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