Rolling a finger off a hole to create a sliding pitch change.

The mysterious voice is masked using a phaser and a pitch change.

If a speaker uses strong pitch changes, it will probably be for pronunciation.

Motor problems or belt slippage can cause momentary pitch changes.

This version has been slightly altered from the original, just a pitch change to...

People who are tone deaf also fail to hear pitch changes in the human voice, so this deficit does not seem specific to music.

"Gradual pitch change to seventeen degrees," the woman's voice directed from the console.

Only the sales pitch changes with the state of the economy.

Exercises to practice pitch changes when you speak.

When pitch changes, the position of the breaks vis-a-vis the score shifts.