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Portal:Music
drew Roberts has some spoken word works under the Creative Commons Attribution-ShareAlike license.
They can be found here: some of drew's stuff
Some people have made some music using some of these - look here for the music.
Loca Records releases all music on the label as CC-BY-SA (though there are some older works that are EFF Open Audio and GPL'd). Loca Records Website
The quick way into their downloads is Loca Music as MP3/Ogg