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DAC + ADC Microphone Detection

Hello,

I am currently using the DAC+ADC to record sound from my microphone. Everything is working perfectly on my raspberry pi but now I would like to detect if a microphone is plugged into the DAC+ADC or not. I saw that I could use the value of the input resistance but I don't think it is possible to have access to this value (correct me if I'm wrong!).

How could I check if my microphone is plugged or not? Should I use some signal processing to compute the sound level and put a threshold on it?

I thank you all in advance!

Best wishes,

Frank

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