How to Save FFT output for fast read-in?

1. What is the output of Fast Fourier Transform?
2. What makes the FFT fast?
3. What is 64 point FFT?
4. How do you read a FFT plot?

What is the output of Fast Fourier Transform?

These frequencies actually represent the frequencies of the two sine waves which generated the signal. The output of the Fourier transform is nothing more than a frequency domain view of the original time domain signal.

What makes the FFT fast?

the easiest way to understand why its faster is because FFT uses both cos+sin on the other hand DFT only uses cos, DFT is more common because it requires less space in compression in general for image, sound,... the other comments are do a deep dive, mine is just a taste of the stuff.

What is 64 point FFT?

The 64-point FFT is realized by decomposing it into a two-dimensional structure of 8-point FFTs. This approach reduces the number of required complex multiplications compared to the conventional radix-2 64-point FFT algorithm. The complex multiplication operations are realized using shift-and-add operations.

How do you read a FFT plot?

FFTs of complex vibrations have multiple peaks- one for each frequency present in the vibration. Low frequency peaks are shown at the left end of the graph. The left-most peak represents the fundamental. Other peaks indicate overtones.