Uploaded March 2026 | Updated September 2026, 2 weeks ago

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There’s something strangely satisfying about watching sound.

In this video I built a real-time audio spectrum analyzer that turns sound into colorful moving bars. Music, whistles, instruments – everything becomes a visual pattern.

What you’re seeing is the frequency spectrum of the sound captured by a microphone and processed using FFT (Fast Fourier Transform) on a microcontroller (ESP32). Each bar represents a different frequency band.

Sometimes sound looks even better than it sounds.

If you enjoy audio visualizers, electronics projects, or satisfying visuals, you’ll probably like this.

BOARD USED:
waveshare.com/esp32-s3-touch-amoled-1.8.htm?&aff_id=106038

ARDUINO IDE CODE: github.com/VolosR/spectrum24
EASY TO FLASH FIRMWHARE: drive.google.com/file/d/1W7VIZVaNSBg2SUs6M8lWmXd9wRGoNwAZ/view?usp=drive_link

flashing tool: espressif.github.io/esptool-js

☕️ Support me on:
KO-FI ko-fi.com/volosprojects
PATREON: patreon.com/VolosProjects

#esp32
#audiovisualizer
#spectrumanalyzer
#vumeter
#diyproject