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maxpou  
#1 Posted : Monday, October 4, 2021 12:03:28 AM(UTC)
maxpou

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Hi guys,
I have a DAC with a COD and s / pdif module and it has a crackle output when I want to listen to an ultra HD song like Roger Waters by amazon HD but not if I listen to Patricia Barber. The only difference between them is that the first is 24bits / 192khz and the second is 24bits / 96khz. When there is a crackle the LEDs d1, d2 and d4 turn green and red, if I place my fingers on the wires between the s / pdif module and the dac the crackle stops. Someone can help me? thank you!

Edited by user Monday, October 4, 2021 12:09:48 AM(UTC)  | Reason: Not specified

Brian Donegan  
#2 Posted : Monday, October 4, 2021 1:27:31 PM(UTC)
Brian Donegan

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That's a pretty interesting problem. Can you post a picture of your setup and wiring?

My first guess would be a loose connection, or a wire routing issue, but it is hard to say. 192kHz is a noisier bitclock (higher frequency) so it may be highlighting an issue you don't see (hear) with 96kHz.

maxpou  
#3 Posted : Sunday, October 10, 2021 11:30:08 AM(UTC)
maxpou

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Hi Brian,
thank you for reply, here picture inside of my dac. Maxpou 20211004_173132-1.jpg (315kb) downloaded 4 time(s). 20211004_173048-1.jpg (332kb) downloaded 4 time(s).
maxpou  
#4 Posted : Thursday, October 14, 2021 11:01:53 PM(UTC)
maxpou

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Hi Brian,
do you see anythink in the pictures and if you want another pictures let me know? Thank you! Maxpou
Brian Donegan  
#5 Posted : Friday, October 15, 2021 2:21:56 PM(UTC)
Brian Donegan

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Nothing jumps out. I would try removing the I2S wires completely, and then putting them back in, making sure they are spaced out from one another and that they are well secured. I would also try to move the power wires for the modules as far fro the I2S lines as possible.
maxpou  
#6 Posted : Sunday, October 17, 2021 12:16:35 PM(UTC)
maxpou

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Hi Brian,
finally i found my problem. It was my cable between my streamer and my dac. I had a good interconnect but not a digital cable 75 ohms. when i tried with a old digital video cable 75 ohms pheonix gold of 2 meters lenght, my problem disapear. thank you! MaxpouAngel
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