Can you download a 'autotune' feature for audacity? If not can you take audio from audacity and put it in say 'adobe audition 3' or fruity loops or something that is autotune capable?
Yea. It works with many DAW software. FL studio is just one of them and isn't the best - or worst - DAW application for Antares AutoTune.
It doesn't matter what DAW software the OP uses as long as it has plug in capability..... Nuendo, Digital Performer, Sonar, Cubase, ProTools, Logic, Reaper, Adobe Audition 3, FL Studio........