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"YouTube has updated the audio editing capabilities it offers users, with several important improvements including an extended library of more than 150,000 backing tracks. \nOther improvements include a new interface (pictured above), the ability to mix music into your video at different volume levels (from \u201Csoft background\u201D to \u201Ccompletely replace\u201D), and a choice of featured tracks that makes it easy to find a song that fits with your video's mood. \nTo try out these new features, go to Video Manager \u2014 Edit \u2014 Enhancements \u2014 Audio.\nThe new features will be available worldwide over the next day, and YouTube promises more improvement to come in the future. Check out a video demonstration below.\n\n\n\n"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/04/19/youtube-improves-audio-editing/>