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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
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Old 5th December 2017, 09:05 PM   #4541
audioengr is offline audioengr  United States
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Ian - did any of your HAT boards need a special driver and if so, did you generate one?

Is it included or listed on the various OS's available?

Thanks
Steve N.
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Old 7th December 2017, 08:06 AM   #4542
nounouchet is online now nounouchet  France
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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
It wotks well now.

I need to use Mute output to prevent "ploc" with my ak4490 DAC.
I need to reverse the signal. Which 3.3V regulator output i must utilize to do that ? (Driver reg ?)

Nounouchet
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Old 12th December 2017, 04:07 PM   #4543
wealas is offline wealas
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Is there any way to have Mcfifo send BCLK and LRCK to a digital source instead of MCLK?
The way the slave mode works on NanoPi is it expects to select the clock and divider via GPIO and then get the correct BCLK and LRCK streams as input in order to send the data stream out.

I know I can do the clock selection in slave mode on McFifo but would it work with only data input with no BCLK and LRCK?
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Old 14th December 2017, 02:41 PM   #4544
canvas is offline canvas  Taiwan
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I just want to report a long time problem of Ian's SPDIF interface board. It could be your problem, too. My copy has a faulty BNC connector from the very beginning. It's not easy to get SPDIF locked by DIR. I have to plug and unplug many times to get it locked. In addition, the locked signal will lose when any electronic devices are switched on & off near by. The following picture shows what I did to the BNC connector. I soldered the ground wire with the metal shield. They should be connected, but they are not in my case. If you have similar problem, you should measure the resistance between them as I got several mega ohm reading on my copy!

Click the image to open in full size.
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Old 14th December 2017, 03:29 PM   #4545
iancanada is offline iancanada  Canada
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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Quote:
Originally Posted by canvas View Post
I just want to report a long time problem of Ian's SPDIF interface board. It could be your problem, too. My copy has a faulty BNC connector from the very beginning. It's not easy to get SPDIF locked by DIR. I have to plug and unplug many times to get it locked. In addition, the locked signal will lose when any electronic devices are switched on & off near by. The following picture shows what I did to the BNC connector. I soldered the ground wire with the metal shield. They should be connected, but they are not in my case. If you have similar problem, you should measure the resistance between them as I got several mega ohm reading on my copy!

Click the image to open in full size.
Did you fixed this issue after you soldered the ground pin?

I'v never have this problem. Thank you for figuring it out.

I can send a new connector to you. Please let me know.

Regards,
Ian
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Old 15th December 2017, 12:34 AM   #4546
canvas is offline canvas  Taiwan
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Quote:
Originally Posted by iancanada View Post
Did you fixed this issue after you soldered the ground pin?

I'v never have this problem. Thank you for figuring it out.

I can send a new connector to you. Please let me know.

Regards,
Ian
Hi Ian,

Yes, the issue was fixed immediately. It would be great to have a replacement parts from you. Thanks.

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Old 15th December 2017, 12:43 AM   #4547
iancanada is offline iancanada  Canada
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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Quote:
Originally Posted by canvas View Post
Hi Ian,

Yes, the issue was fixed immediately. It would be great to have a replacement parts from you. Thanks.

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Please PM your shipping address. I'll ship a new BNC connector to you.

Sorry about the issue.

Regards,
Ian
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Old 15th December 2017, 02:42 AM   #4548
atom6422 is offline atom6422  South Korea
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Hi, canvas and Ian

Thank you for your information about SPDIF interface board.

I had the similar problem of SPDIF interface board. I will try to fix the problem in next january and will let you know the resullt.

Regards,
Atom
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Old 15th December 2017, 10:11 AM   #4549
canvas is offline canvas  Taiwan
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Quote:
Originally Posted by atom6422 View Post
Hi, canvas and Ian

Thank you for your information about SPDIF interface board.

I had the similar problem of SPDIF interface board. I will try to fix the problem in next january and will let you know the resullt.

Regards,
Atom
Hi Atom,

This can be verified by simply using a DMM. Please let us know your result. I was always suspecting the SPDIF source and trying to mod it without success. (Who would thought it would be the BNC?)


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