Some people can't sing or hear musical notes. This is called congenital amusia. Some people are tone-deaf. This means that they can hear music perfectly, but they can't sing it. This is because they have a different vocal system. People can become better at singing by shaping their vowels and rounding their lips. Sound is changed into song from two things. Frequency, which is the distance between two sequenced waves, and amplitude, which is the height of the waves.

Why are some people better at singing than others?