How can I make my voice high in videos without speeding the video itself up?

Question

You know fred's videos, and some of xsurfallday's videos from youtube, they have sped up their voices in some, how can i do that without speeding up the video itself?

Answer 1

pitch control. It uses a special algorithm to stretch out the sampling when speeding up the audio, thus no making it faster audio, but only higher pitch.

A similar technology has been created for photos, where you can stretch or reduce photo while not actually deforming them...