Why does the pitch of an audio clip go higher or lower when slowed or sped up?

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Why does the pitch of an audio clip go higher or lower when slowed or sped up?

In: Technology

The pitch is directly related to the frequency of the sound wave measured by the number of wiggles over time. If you speed up or slow down a song, you’re affecting the “time” part of the pitch.

Because frequency is “over time”, slowing down or lengthening the time lowers the frequency/pitch. Likewise, speeding up or shortening time raises the frequency/pitch.

Pitch is the length between the peaks of the sound wave when you adjust the speed it changes the length between peaks

Typically, this would be done by speeding up a tape.

Pitch is defined by frequency of notes. Higher frequency = higher pitch, lower freq = lower pitch.

Imagine a length of paper tape with marks on it at regular intervals, say 1 inch between each.

Move the tape at 1 inch per second, and you have frequency of 1 mark per sec. Double the speed, and the frequency will be 2 marks per second. Double it again, and the frequency is 4 marks per second.

That’s how you increase frequency. Frequency goes up, pitch goes up.