Audacity: audio editor

I've been using Audacity, open source digital audio editor, for long time. I've start using Audacity to edit audio files but it also ended up replacing all my mp3 encoding software. For those who want to learn how to use the software, here are the tutorial videos on YouTube I've found today.

Getting and setting up Audacity

Recording an Audio Podcast mp3 with Audacity

Mixing with Audacity