Audacity is an audio editing/production program that is installed on all student and teacher computers. It helps you easily create quality voice, music and sound effects recordings. It will also allow you to edit and mash existing recordings. With it you can remove unwanted background noise, improve voice quality, equalize the volume, and much more. This is the perfect medium for creating pod casts.
This 15 minute tutorial provides all you need to know to be an audio file guru.
Audacity 2018 Basic Editing Tutorial for Beginners: Make Your Voice Sound Good