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Using zero crossings (which only works for pure tones) doesn't involve any Fourier transform at all. You literally just look at where the signal crosses zero.
by jefftk 7y ago
Using zero crossings (which only works for pure tones) doesn't involve any Fourier transform at all. You literally just look at where the signal crosses zero.
- sudosysgen 7y agoYes, you don't need doing any fourier transform, but it seems to me to be equivalent to doing signal processing after a fourier transform with the knowledge that it's a pure tone.