I'm in need of some tunes for my game. Where can I procure some, preferably for free?
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There's a great (long) list of music/sound sources at UnityAnswers: Where can I find music or sound effects for my game?. A sampler of some of the free ones:
If you're interested in creating a large amount of music (for one game or many in the future), I'd recommend grabbing some easy to use music creation software (like GarageBand on OSX, or ACID on Windows). It's pretty easy to create some basic tracks with the included samples, and you can pretty affordably find more samples.
Don't think you can write music? Do what I've done for a long time: stitch together the classics. Go to your local music store and find some sheet music for Beethoven or other copyright-expired orchestrations. Don't borrow the whole arrangements (they're often copyrighted), but grab a few bars of the melody or harmony. Shift it a few keys or try it with some odd instrumentation. The results can be pretty solid.
When it comes to music that is mostly original, I am very fond of the Newgrounds Audio Portal. Of course you have to ask for permission first, and abide by the Creative Commons restrictions that the creator has placed, but in general its very nice.
There is alot of talent there though.
I love the netlabels section of Archive.org for this purpose. Lots and lots of interesting music that is [mostly] freely available for use (check individual licenses). Great search capability too.
I would say it is for background pieces or ambiance more than anything.
Following the line of Creative Commons license, you can find a lot of content here: http://labs.creativecommons.org/demos/search/search1/?q=
Posted this on Happy Penguin some time ago:
Offering his music for free in games, so long as they complied with some sort of FOSS licence.
I would definitely check out the Kongregate Collabs. The licenses are all different (usually free for noncommercial use, but some things there allow commercial use for free), but you can find some pretty good compositions.
Again, there are a lot of other places already mentioned, like the free sound project.
Jamendo has a massive collection of excellent quality music tracks which are mostly under various Creative Commons licenses:
Look out for the "No Derivatives" tag. The definition of a derivative work is somewhat vague, so its best to avoid them, or ask the artist/composer. "Share-Alike" could also be a bit iffy.
The site likes to mention that you should pay up for Jamendo Pro in order to use tracks for commercial works, but if the track is under a compatible Creative Commons licence (ie, CC-BY), then you don't have to pay up (although obviously its always a good idea to make sure the music creator gets a share of the profits, they deserve it!) Of course, if the track is under a non-compatible CC licence, then you will have to pay up, or ask the artist nicely.
I am affiliated with this site. Our goal is to connect musicians with companies (or people) in need of music. Musicians provide some of their music for free, in order to try and sell more of their music later. All the music on our community site is free and licensed under a Creative Commons license. The music on Tribe of Noise PRO is not free.