How do you pronounce "envelope"?

Hi Sparteye. I pronounce it "ahn"velope just because it has a more refined quality of sound to me when I say it that way. I'm inconsistent though. I say, "pa-sta" instead of "pah-sta" and "Maz-da" instead of "Mahz-da". I believe this is a Canadian influence as my fiance, who is American, emphatically insists on the latter enunciations of the two afore-mentioned words. Then again, there is some speculation on both our parts that he was born with the pretentious, word-pronouncing-snob gene.