ESP32 to Process Audio Signals: Software (Fourier Transforms) and Hardware (MSGEQ7)

Here we use ESP32 microcontroller to analyze real-time audio signals Real-time FFT to get frequencies Use MSGEQ7 chip to get the same data Display frequency bands on LEDs as bars FFT basics: GitHub: debsahu/ESP32_FFT_Audio_LEDs Libraries Needed Software FFT platformio.ini and Hardware FFT platformio.ini is included, use PlatformIO and it will take care of installing the following libraries. Library Link arduinoFFT WS2812FX MD_MSGEQ7 Known Limitations Sampling frequency must be high Sampling time should not interfere with other WiFi functions FFT calculations are CPU intensive Frequency binning needs to be done manually Wiring

March 4, 2019 · Debashish Sahu