Below are a list of commonly used audio/music websites that can be used for free or near to free. Please follow the site rules on each site for attribution as each has its own guidelines for re-using content on their sites.

Audio Library

Creative Common licensed audio by genres and various artists. Creative Commons, must attribute artist.

Creative Commons music

Free Music Archive

Sound Dogs

A site filled with downloadable sound Effects.  Not free but very inexpensive if you need a particular sound effect for your presentations, videos and class materials.

YouTube Audio Library

YouTube has a selection of free music that can be used. However, you will require to sign up for a YouTube account before accessing this library.