Touch-Tone Terrorists - Racist Customer Looking for Somebody, ft. Jim Bob and Big Willie 

I had all four CDs of this in the early 2000s. The man doing all the voices was a pseudonym called a Repete. He sold the voice synthesizer thing later on and retired from doing this. He leased a bunch of 1-800 numbers that were one number off from UPS or Federal Express and these became his prank phone calls.

_"I'm gonna bring him on charges!"_ *EARLIER* _"N*****!"_

Hehehe, sounds like an evil racist twin version of Marianne from Brooklyn.

He’s not doing it anymore and hasn’t for probably 20 years. He sold his voice synthesizer.