## Spectral Formula of a WaveformFor the curious: the spectral formula of a waveform gives a simple relationship between the partial number and its amplitude (remember, we know its frequency from the Fourier theorem). For example, the formula for a square wave is an amplitude of 1/ Using the formula, we can compute the following partial strengths for a square wave:
and so on. There are some other simple waveforms whose formulae are well known:
Surprisingly, as we mentioned in Section 1.4, |

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