I need to create an FFT the same as this example

Hi, I am anyisying a piece of prerecorded aduio and need to create a graph very similar to this.

[Walter Roberson]

see the first example of fft()

Answer 1

[Vaibhav Tomar]

You may refer to the following link for creating the required FFT:

https://www.mathworks.com/help/matlab/ref/fft.html#buuutyt-7

This illustrates the example you have mentioned above.