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ceviri

Ah, I remember similar things from high school physics (beat frequency etc.)

dtorresr

Wow, so after recording two sounds at very different frequencies, it is technically possible to get very similar frequencies when you play them back.

Azure

How do you sample frequencies? A frequency can't be determined with just one point; it's like a frequency is a derivative, where you need lots of points in order to reconstruct the frequency. So then, if your frequency is constantly changing, how do you determine when to sample from one wave instead of the next?