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Choose a waveform and note, listen to its sound, and look at the plots of the waveform and the Fourier spectrum. Notice that the tone quality of the sound changes with the changing waveform. Try this for various notes. As you change the selected note, you can use the sliders to change the time scale on the waveform plot and the maximum frequency and maximum amplitude on the Fourier spectrum plot to get a better view.
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