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Topic: how to use FFT library (Read 3492 times) previous topic - next topic


Jan 17, 2020, 05:52 pm Last Edit: Jan 17, 2020, 05:52 pm by MarkT
You take the autocorrelation, then the spectrum of that, and you'll get a strong signal at the fundamental even if the original signal is all harmonics and no fundamental!!
Whoops, made a mistake there, you square the auto-correlation before taking its FFT to get the fundamental showing up strongly...  Otherwise you've only the PSD as gfvalvo points out.
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