2018
AL#135 p.45               
Juan Oscar Azaret                                                                                           

▪ Tap on a guitar. Or listen to just the first fraction of a second as you pluck a note. Those tiny samples contain a wealth of information. Our brains already form an impression of the guitar’s sound, long before the first second has elapsed. Computers can reveal the math behind the music and help us understand and visualize what is happening. Good basic info about the FFT, that is, the Fast Fourier Transform, and how the information in a guitar tap can be viewed in the time domain or the frequency domain.