Yes, Audacity is pretty solid and easy to use. I use ProTools which is a little more flexible, but very costly. I used it when I mixed some music for the TOC. I think the secret of good freestyle (lets call it AA) music is the CHOICE of track and the different pace that you create both with the music and the plane. When you get down to it, it can make or break your performance, no matter how technical or extreme you fly.