The low-tech way would be to inhale a bit of helium, which has a low density, making your voice higher.
A better way would be to open the video in some video-editing software on your computer, and then add an effect to the sound of your voice to make it sound higher.
You need a very high pitched voice. And loud
they don't, they just give you a high pitched voice
Depending on the program you're using there might be a option to edit the audio levels if there is just make them either high pitched or slow them down.
you breath in the helium (you need to breath it in with out letting it out) and then talk.
You talk slowly into the camera and use a video editing program (like iMovie or Windows Movie Maker) to speed up the video clip, and you'll be talking twice as fast in a high voice like Fred.
No, Fred's voice is not real. He uses a certain software that allows him to make his voice very high-pitched.
When you sing in a high pitched voice the sound you make travels fast wich causes the glass to shattef
Make sure you drink lots and lots of water. You don't want your throat to be dry! Then, face the ceiling. It helps you talk higher. If you dont like doing that stand in a high place like a bed. Make sure you don't have hiccups when you do this. Cough and try singing in a high voice first. Then talk in it. There you go, you have a high voice!
Plenty of people make fun of Bruno Mars, and his voice, just like Justin Bieber and this is very wrong but now his voice is very low cos it broke.
I think it's a special program he used to make his voice sound higher pitched.
by using high quality cameras?
Well I don't really think this will work for you but I start talking in this really high pitched squeaky voice, or I just laugh a lot.