Nothing wrong with Audacity... for a freebie it's as good as it gets, and it's streets ahead of Adobe Audition (was CoolEdit before Adobe bought it).

Just because it's free it doesn't mean it's no good!!

I'm more comfortable with SoundForge, though, which I've been using for around 15 years - I started with a bootleg of SoundForge 5, which prompted me to buy a legit version - I'm now up to version 10!