Creative Common is popular among image files but there are different other content types that are also licensed under creative commons. There are many websites that provides you content like creative common text, creative common videos and creative common music etc. SoundCloud is a popular website you can use for finding some creative common music but on cloud there are no shortage of domains running websites where you can search plenty of it to share, remix and even use it commercially.
Free Music Archive
If you also know about some good service offering free, creative common sound the feel free to share it by posting a comment.