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The Complete Guide to Recording an Analog Microphone with ESP32 to an SD card | by Cawin Chan | CodeX | Medium
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MAX9814 Microphone AGC Amplifier Board Sound Sensor Module Auto Gain Control Attack for Arduino MAX4466 PCB Board Diy Kit - AliExpress
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Amazon.com: MAX9814 Electret Microphone Amplifier Board Module MIC Auto Gain Max 40dB/50dB/60dB Frequency 2.7V-5.5V with Pins for Arduino : Electronics
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