It is called "pitch."
Ball.
A pitch indicator is called a metronome tuner.
Balk!
No, cold weather is bad. It can change the pitch of the strings.
The distance in pitch between two musical notes is called an interval.
A high pitch singer is called an alto or soprano.
fall
It's absolutely BAd
The name of a high pitch is called a squeak.
An inside pitch
A changeup pitch is a slow pitch thrown to look like a fastball.