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 https://github.com/kosme/arduinoFFT WS2812FX https://github.com/kitesurfer1404/WS2812FX MD_MSGEQ7 https://github.com/debsahu/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