The Energon Pub

Who originally sang it? I was just wondering if anyone might know what voice actors or singers sang the Original G1 Theme. I know they used some vocoding with the voices such as in the Lyrics "Transformers, Robots in Disguise" but in the rest of the Lyrics there is definitely a few guys singing together. They are not mentioned in the Credits At All.
This maybe usless facts but it crossed my mind.
Maybe I should of put this in the Trivia thread but I don't think anyone would get it.
Any guesses?
sto_vo_kor_2000? C'mon dude bring it!