UB0212 microphone very noisy


I’ve recently bought UB0212 and I have a strong parasitic whistle noise while recording microphone fitted on the camera board.

(Raspbian Fetch release, record level set with alsamixer, recorded with arecord and default parameters).

Is this normal or do I have to send back the camera to the supplier?

Thanks and best regards





Sorry for my later reply. Can you attach me a audio demo I will cc to the local factory for assesment.