: The most maintained version is available on kosme’s fix_fft GitHub.

Turbocharge Your Arduino: Faster FFT with the fix_fft Library

: It performs the transform directly within the input array to save RAM. Where to Download

Most Arduino FFT libraries (like arduinoFFT ) process signals using "doubles" or "floats." While accurate, these data types are handled purely in software on most microcontrollers, making them slow. The library is a game-changer because:

: Integer-based processing halves the memory consumption compared to normal FFTs.

Since this is a specialized library, it is often manually installed rather than found in the standard Library Manager.