how come when you speed up an audio track, the pitch also (usually) goes up?

Question

how come when you speed up an audio track, the pitch also (usually) goes up?

In: 38

Answer 1

pitch is, basically, frequency, as in how many times a sound wave changes in a given time frame (normally a second).

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you speed up a audio track, you make everything happen faster, you increase the frequency, everything is higher pitch.