I think that's mostly just a frequency shift :) You could probably recreate it with another model and some effects on top. Also, why the hell not for voice mode haha.

One popular speech synth from back in the day, I believe it was WillowTalk, had a voice called Colossus, which sounded like the voice module of the computer from Colossus: The Forbin Project. This voice was used for that of CATS in the famous "All your base are belong to us" Flash video.

Another WillowTalk voice was a clone of DECtalk's Perfect Paul good enough to be used as the voice in the MC Hawking rap recordings.

I am having a hell of a time googling for WillowTalk, do you know any links/places where I can learn more? Maybe even download something?

It came from a company called Willow Pond Software. That seems to narrow searches down.

WillowTalk is apparently still of interest to Half-Life modders because another WillowTalk voice, possibly a clone of DECtalk's Huge Harry, was used as the Black Mesa VOX facility-wide announcement system in the original Half-Life.