ESP32 Audio Input - MAX4466, MAX9814, SPH0645LM4H, INMP441 In this blog post, I've delved deep into the world of audio input for ESP32, exploring all the different options for getting analogue audio data into the device. After discussing the use of the built-in Analogue to Digital Converts (ADCs), I2S to read ADCs with DMA, and using I2S to read directly from compatible peripherals, I go on to present hands-on experiments with four different microphones (MAX4466, MAX9814, SPH0645, INPM441). This comprehensive look at getting audio into the ESP32 should be a valuable resource for anyone hungry for a deep-dive into ESP32's audio capabilities, complete with YouTube videos for an... 12 September 2020