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.
You can embed SoundCloud in your WordPress posts using WordPress feature oEmbed. It supports auto embedding until your URL breaks the line. WP oEmbed library supports Twitter, YouTube and many other popular services. SoundCloud is not yet supported by WordPress but still you have it by using oEmbed with the help of this function: wp_oembed_add_provider()
Adding oEmbed for SoundCloud in WordPress:
Open your theme’s function.php file and add the following code:
wp_oembed_add_provider( ‘http://soundcloud.com/*’, ‘http://soundcloud.com/oembed’ );
All done. Now you can simply paste SoundCloud URL on separate line and let oEmbed do auto-embedding.