its 100% auto-tune. you can hear the autotune on a lot of mainstream r&b albums where they aren't even going for that effect, auto tune has a very particular sound to it once you learn it, so i dont get how people could even be questioning what t-pain uses when he uses it so heavily.
never listen to producers or artists when they say what they use in interviews or endorsements. i dont know if its because they're paranoid about safeguarding their secrets or they just don't know half the time, but just because some dude says he uses sonar or some plugin in an interview definitely does not mean he uses it in real life.
the one thing all these successful guys do use is work ethic...unfortunately that doesn't come in a box for $250.
