The output of the FFT is just a list of complex numbers. But, we are used to seeing the FFT of a signal represented as a graph of magnitude or phase plotted against frequency. In this video, I explain how to convert the output of the FFT into the magnitude and phase graphs we know and love.
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Last Video: Output of the FFT | Frequency:
https://youtu.be/3aOaUv3s8RY
How the Fourier Series Works (Book and Kindle eBook)
https://www.amazon.com/dp/B0B1BY5H6T
0:00 - Introduction
0:45 - Ident
0:49 - Welcome
1:18 - Pythagoras' Triangles
1:38 - The FFT output list
2:28 - Rotating triangles, sines, and cosines
3:22 - Representing a sinusoid using a triangle - Part 1
3:39 - The difference between magnitude and amplitude
4:42 - Representing a sinusoid using a triangle - Part 2
5:08 - Adding sines and cosines
5:16 - Calculating magnitude and phase, an analogy - Part 1
6:57 - Calculating the magnitude using Pythagoras' Theorem
7:34 - Calculating magnitude and phase, an analogy - Part 2
7:44 - Calculating the phase using the inverse tangent rule
9:22 - Applying what we've learned to the output of the FFT
9:40 - Book a consultation
9:53 - Something strange in the FFT output
10:11 - Challenge
3D Model:
Portrait of the philosopher Pythagoras Geoffrey Marchal
https://skfb.ly/6F7CJ
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