I intended to use a INMP401 (MEMS MIC) to capture audio and stream it via bluetooth using an RN-52 bluetooth module (RN-52). The RN-52 has inputs for differential +- signals.

The INMP outputs single channel audio peak to peak at approximately 200mV. I presumed that connecting this to the L+ input of the RN-52 via a 47nF capacitor and connecting the L- of the RN-52 to ground would allow me to capture audio. However the audio I receive is highly distorted and noisy.

I have tried to recreate the circuit shown here:

enter image description here

This however still remains unusable. Any advice on how to get the two devices connected effectively would be greatly appreciated. TIA.


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