Use Pitch Shifter in Final Cut Pro
Pitch Shifter is used most effectively when you take a structured approach.
In the Final Cut Pro timeline, select a clip with the Pitch Shifter effect applied, then open the effect’s settings in the Audio inspector.
For information about adding the effect and showing its controls, see Add Logic effects to clips in Final Cut Pro.
To set the amount of transposition, or pitch shift, drag the Semi Tones slider.
To set the amount of detuning, drag the Cents slider.
Click the Timing pop-up menu and choose the algorithm that best matches the material you’re working with.
If you’re working with material that doesn’t fit any of these categories, experiment with each of the algorithms (starting with Speech), then compare the results and use the one that best suits your material.
Tip: While auditioning and comparing different settings, temporarily set the Mix parameter to 100% because this makes Pitch Shifter artifacts easier to hear.