FFT – fast Fourier transform
FFT is the math used to allow us to measure a signal and break it out into it’s various and individual parts. Ignore this information if you are only interested in making audio measurements and not understanding how the measurement is made.
WIKI – fast Fourier transform
WIKI – Discrete Fourier Transform
Tektronics – FFT study guide
Tektronics – What is the FFT (fast Fourier transform)
Tektronics – FFT video example
Stanford University – Lecture 1 : The Fourier Transforms and its Applications
Stanford University – Lecture 2 : The Fourier Transforms and its Applications
Stanford University – Lecture 3 : The Fourier Transforms and its Applications
Stanford University – Lecture 4 : The Fourier Transforms and its Applications
Stanford University – Lecture 5 : The Fourier Transforms and its Applications
Stanford University – Lecture 6 : The Fourier Transforms and its Applications
Stanford University – Lecture 7 : The Fourier Transforms and its Applications
Stanford University – Lecture 8 : The Fourier Transforms and its Applications