On the
Main panel, turn On the
Voice Morpher (1) module or click
Voice Morpher icon (2).
Move the cursor (3) on the Pitch-Timbre graph (also called the Morpher graph) to change the voice.
For me, Pitch is 51% and Timbre is 86 % make me sound like Optimus most.
Click
Preferences on Menu bar
Choose
Vowel Enhancer
Turn ON Vowel Enhancer(1) and make some adjustments on the slides (2) following the below image.
For instant use, you can download the Optimus Prime Robot voice preset from here.
To learn how to use the preset of voice changer software, click here.