Hifi Berry Amp2 buzz on right side with RPi 3

Setting up with piCorePlayer and squeelite on it (LMS server on other machine) when the squeezelite player is on with  or without music running there is a noise on right side.

Test until now : 

- switch speaker (the noise stay on same side not the same speaker)

- switch with an other RPi (same behavior)

- switch Os with raspbian (same behavior)

I also tested differents configs options, differents electrical socket with same buzzing noise on the right side.

Do you have any other ideas to try or could the amp be faulty, given that it is brand new?


Thanks in advance


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