Projects/IoT & Electronics/ESP32 to Process Audio Signals...
March 4, 2019
2 min read
IoT & Electronics
ESP32 to Process Audio Signals: Software (Fourier Transforms) and Hardware (MSGEQ7)
📺 Watch the Video View on YouTube --- Here we use ESP32 microcontroller to analyze real-time audio signals 1. Real-time FFT to get frequencies 2. Use...
📺 Watch the Video
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:
📺 Watch the Video
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
