If you have a spectrum object, spectrum, and print the first few values of spectrum.fs, you'll see that they start at zero. So spectrum.hs[0] is the magnitude of the component with frequency 0. But what does that mean? Try this experiment: 1. Make a triangle signal with frequency 440 and make a Wave with duration 0.01 seconds. Plot the waveform. 2. Make a Spectrum object and print spectrum.hs[0]. What is the amplitude and phase of this component? 3. Set spectrum.hs[0] = 100. Make a Wave from the modified Spectrum and plot it. What effect does this operation have on the waveform?