[ Thanks to Ramsai
for this link. ]
“You can use Audacity to import music into your project, convert
different audio files from one format to another, bring in multiple
files and convert them, and more. In this article by Bethany
Hiitola, author of Getting started with Audacity 1.3, we will learn
how to add background music into your podcast, overdub, and fade in
and out. We will also discuss some additional information about
importing music from CDs, cassette tapes, and vinyl records.”