As you may have seen you can now upload native audio to your Passle post.
It is very easy to record audio. You do not need any software at all. Just search record on your computer and your computer will record your voice. Take this file and upload. Could not be easier.
However, if you want to edit your audio you will probably want to use audio software. My recommendation after having a look around this week is try Audacity. It is free. Simply click here to download.
Check out the video below on how to use it. Easy to understand.
How To Record and Edit Audio In Audacity - Beginner Tutorial