Unfortunately, the Speech Synthesis skill in ARC does not have a specific voice that sounds like C3PO from Star Wars. However, you can experiment with the available voices in the drop-down menu and adjust the emphasis, rate, and volume settings to get a voice that is close to what you are looking for. You can also try downloading and installing additional voices on your computer to expand your options.

hi mstephens

maybe this you can use .

3cpo voice

I use Audacity, it's free, for robot voices. Search YouTube for a C3PO with Audacity

I did a simple search and found https://youtu.be/nZSxpe87McA

or use the  Audiotoolbox plugin.  Add a script with ControlCommand("AudioToolbox Plugin", ImportUwpVoices)

In Speech Setting plugin, try George. - many ways to change voices there

here are my settings for you to try