How a singer changes his voice at every music?

Lester23

Commendable
May 10, 2016
3
0
1,510
Hello I ever put this question for a while, and even google couldn't help me much. I'm listening to multiple bands and I realize every song they have the singer has different voice, and I don't think that's natural at all.

My final question is how they make it ? What computers/programs they use to change the pitch of voice. Sorry if it's in wrong category. Thanks a lot for those who's helping me :)