###### Arduino

## FFT Speed on Microcontrollers

In my Arduino AudioTools I am providing an easy API with different implementations for Fast Fourier Transform (FFT). This is a clever algorithm that can extracts the frequencies from an input signal. So far I never looked at the speed, so I thought it might be interesting to get to know the numbers. Setup I was using an ESP32 and an STM32F411 Black Pill for my tests. The FFT was executed for a length of Read more…