Quite a few people have asked me in the past where I get the great music tracks for my games. I have found two great sources where it seems no matter what feel of music I want, they have something for me.
One source is Incompetech, with tracks composed mostly by Kevin MacLeod. He has literally hundreds of tracks, and you can easily search by genre or feel: http://incompetech.com/music/royalty-free/
My other go-to guy is Dan-O. He also has well over 100 tracks available, arranged by genre. He even has a few vocal pieces in there: http://www.danosongs.com/
When I’m looking for musical pieces, I like to just browse through both of their libraries, note any viable candidate tracks, then have a listen-off among those tracks, picturing the game in my mind. Usually I end up with too many tracks, and have a hard decision of which ones to cut out.
It always brings a smile to my face when I’m watching some internet video or playing a game, and a familiar track comes up, either one that I’ve used or one that I’ve filed in the back of my mind for future use. I’ve even heard one track from EARL’s Warehouse used in a TV commercial.
Both authors have released their works under a Creative Commons Attribution license. Just put them in your credits, and you are good to go, though they won’t mind if you give them a donation for all of their hard work.
Enjoy!