How To put Audio song in NSdata In iphone

I want to hold ipod Library song in NSData开发者_开发技巧 to send on Webservice. how i can get that song in NSdata

You can't do that unfortunately (at least without doing something 'illegal'). Apple has iPod Library access API: http://developer.apple.com/library/ios/#documentation/Audio/Conceptual/iPodLibraryAccess_Guide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008765

However these only allow you to pick songs, read meta data, tell ipod to play songs... not much else