eli5: why is a recorded voice higher when sped up, and lower when slowed down?
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Sped up = shrink down wavelength to fit all the digital information = higher frequency = higher pitch
Slowing down is the opposite.
Sound is just a wave afterall. It has a frequency. In a recorded voice you obviously have so many different sound waves with variable amplitudes and frequencies, and you affect them all by changing the playback speed.
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