I realize this question has been answered, but I thought I'd just mention one other option, and that's Garage Band.
In my opinion, if you're only doing voice, GB is the way to go. Select your mic in MIDI preferences, and you're on your way. The manual is easy to read and understand. You can equalize it, edit it, raise levels without distortion, export it. In all, a great app.
Best of luck.