1 ESP32 spectrum analyser VU meter using arduinoFFT and a FastLED matrix
Scott Marley's walkthrough is often suggested for turning audio into frequency bands on an ESP32 to drive LEDs, with useful background on the maths and sampling.
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3 recommended videos. Channel on YouTube
Scott Marley's walkthrough is often suggested for turning audio into frequency bands on an ESP32 to drive LEDs, with useful background on the maths and sampling.
Recommended for its approach to mapping LEDs in irregularly shaped displays, so normal XY drawing functions can be used on unusual layouts.
Start of Scott Marley's video series on addressable LEDs and FastLED, suggested to newcomers wiring and testing LED strips from an Arduino.