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    Teensy 3.2 to 4.1 broke FFT from analog microphone MAX9814

    Hello friends! About 7 years ago, I built an LED art project using the Teensy 3.2, OctoWS2811, and an Adafruit dev board for the MAX9814. MAX9814 is an amplifier with auto gain. It is analog out, not I2S. Because of supply chain issues resulting in Teensy 3.2 not being available, I upgraded to...