hifiberry dac+ dsp interferences

Hi folks, I am getting interferences on my dac. Not only but, when the green act led blinks on the raspberry pi 4b, I can ear a tick in the speakers. I've tried to  move away the raspberry stack from all other electronic devices and I get the same result. I did order a flat ribbon GPIO cable to test if a distance between the raspberry and the dac board will make a difference.

Any thought on this? 


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