CZT resolution vs FFT resolution

1. What is the resolution of the FFT?
2. What is the main advantage of FFT?
3. How accurate is FFT?
4. What is FFT size in audio?

What is the resolution of the FFT?

Frequency resolution is 10 Hz. The time waveform with length of 0.1 seconds is used for an FFT analysis. The spectrum values are obtained by performing FFT every 10 Hz. The spectrum cannot be obtained with the fractional frequency component values, such as 995, 1001 Hz.

What is the main advantage of FFT?

The main advantage of an FFT is speed, which it gets by decreasing the number of calculations needed to analyze a waveform.

How accurate is FFT?

Discrete Fourier transforms computed through the FFT are far more accurate than slow transforms, and convolutions computed via FFT are far more accurate than the direct results. However, these results depend critically on the accuracy of the FFT software employed, which should generally be considered suspect.

What is FFT size in audio?

The FFT size defines the number of bins used for dividing the window into equal strips, or bins. Hence, a bin is a spectrum sample , and defines the frequency resolution of the window. By default : N (Bins) = FFT Size/2. FR = Fmax/N(Bins)