WEBVTT
Kind: captions
Language: en

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A pure tone is a vibration of air
back and forth at a certain frequency.

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And it sounds like this.

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[tone]

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If you want to raise the pitch of that tone,
you can speed up those vibrations.

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[higher, shorter tone]

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But because you've sped the vibrations up,
that tone doesn't last as long.

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Slow it down...

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[lower, longer tone]

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...and that tone will go on for longer.

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Pitch correction, or auto-tune, is clever.

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When it changes a note that someone's
not quite sung correctly,

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it changes the speed of the vibrations,

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but it also adds or removes some vibrations
so the duration stays the same.

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Except that's not quite the full answer.

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Because musical notes don't sound like this:

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[tone]

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They sound like this.

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- ♫ Hello ♫
- ♫ Hello! ♫

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- ♫ Hello... ♫
- ♫ Hello~ ♫

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Ladies, gentlemen,
and all in between,

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the Gregory Brothers.

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♫

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♫ Oh yeah, some talent's still require~d ♫

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[effects and auto-tune fade out]

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[note continues]

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[gasps]

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- I know we're wandering off,
but I thought that sounded pretty good.

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- That certainly worked for me.

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[laughter]

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- That's good.
- It's a powerful note.

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- That hurt! That actually hurt.