FFT and Signals | Andrew Tuline

Archive | FFT and Signals

On Sound Reactive WLED

2024/02/15 in Arduino, Electronics, FastLED, FFT and Signals, Uncategorized, WLED

After spending a few years writing and sharing animations with the FastLED display library for addressable LED strips, I incorporated sound reactivity to WLED. This included both volume reactive routines as well as frequency reactive routines using various Fast Fourier Transform libraries.

My YouTube account has several animations:

https://www.youtube.com/user/atuline/videos

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Arduino FFT – Post Processing

2020/12/12 in Arduino, FFT and Signals

In using the Arduino FFT library for our ESP32 based project, we select the following sampling information:

SAMPLE_RATE = 10240
SAMPLES = 512

The reason we don’t go higher is that we just don’t need to. Mathematics says that this gives us frequency analysis up to 5120 Khz, and that’s a very high frequency to listen to.

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