[ms]

Hi,
thanks for the answer,
but i’ve tried with a standard 3.5mm mini jack (with only 3 conductors) and i still have this buzz.
the buz is always there , even when the input is disconncted.
what is strange, is that its not the same buzz whether i power the arduino with a USB cable on a PC (its like a light squeek with some kinda loop), as with a 5V power its a buzz close to a white noise (but not exactly).
and when i manipulate the whole with my hand, it change the sound.
looks like a HW pb to me, ground or crosstalk of interference…

anyway i could not find a way to get a clean sound in the output.
if you have ideas.

thanks.

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