The one vibrating faster if you think about when singing in order to hit high notes you must push air faster while when singing lower you slow down the speed o air being pushed its the same with high pitch Nd low pitch frequency higher equals faster and lower equals slower
Companies usually like this reach out to you if you want to get signed up with them. You have to release songs and get recognized. Based on your talent and singing or rapping rate is how you get in.
Mrs Wirak,
Your so lovely and beautiful.
Your like a shiny diamond,
who is not pettiful.
THERE! C;