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Connection of microphones to Stereo Audio Codec

The typical application diagram (Fig. 5-1 in the datasheet) is what you are looking for. So you don't need to build an extra circuit for biasing your electret mics. The _L and _R convention may look ...
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Microphone with LM386

Do Not use a "condenser" microphone. It should be an electret condenser type with its metal case pin connected to your circuit 0V and the other pin is its DC biased audio output. Get rid of ...
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Microphone with LM386

An LM386 is not an “audio op amp”. It is a power amplifier. It should be used for driving speakers or other transducers. It can be coaxed to work as a small signal amplifier, but that requires some ...
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