Voice Changing Software

Hello everyone.

As it turns out, I am in need of software that can alter one's voice live, without need for recording. Specifically, I am looking for a program that can run while I run Vent, Teamspeak, Garageband, or any other program really, that will alter or change my voice when I am speaking into these programs, and retain that change over the internet. I have found programs for windows that do this, such as AV voice changer or MorphVOX, but nothing as such for the mac (all voice changing software for the mac changes the voice input AFTER the fact, not live).

Is there anyone out there who knows if such a program exists?

Thanks. I appreciate it.

I think Garageband can actually change your voice on the fly...

Set up a new voice track and then add a vocal changing effect.