occasional audio noise when powering up ADAU1467

I have downloaded a huge program to the ADAU1467 and during selfboot 

occasionally I get a short loud audio noise when powering up the ADAU1467.

Can someone give me a simple advice what to do in the sigmastudio ( Hibernate ? ) 

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    •  Analog Employees 
    on Dec 4, 2020 2:15 PM 2 months ago

    Does this occur, by any chance, when there is an active S/PDIF input? Is there a trimmed down project you can share that does this?

  • The second problem I have : the readbacks of values ( DSP readback, realtime Display ) only work occasionally ( some values seem to be displayed but not right ) , even though the programming / downloading works fine and the board works fine in terms of audio.

    The strange thing is : I can get - some -  correct values from some Aux Inputs but not from DC sources or GPIO Inputs

    I have lengthened the cable about a few centimeters from USBi to the board. When I use the origanal cable it works fine. I checked four times the cable but can't find any fault ....

    Is the cable crucial in terms of screening / capacity crosstalk etc ? 

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  • The second problem I have : the readbacks of values ( DSP readback, realtime Display ) only work occasionally ( some values seem to be displayed but not right ) , even though the programming / downloading works fine and the board works fine in terms of audio.

    The strange thing is : I can get - some -  correct values from some Aux Inputs but not from DC sources or GPIO Inputs

    I have lengthened the cable about a few centimeters from USBi to the board. When I use the origanal cable it works fine. I checked four times the cable but can't find any fault ....

    Is the cable crucial in terms of screening / capacity crosstalk etc ? 

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