simple mp3 editor(repost)

This is an easy project that shouldn't take long for somebody who knows what they are doing. Most (if not all) of the code needed is already available for free. I need something that will let users record a 15-second voice clip via their computer's mic and attach it to a mp3 file, at the beginning or end. I also need the option of having that mp3 file edited (via fade out) before it is done. So if the user want to fade at 20, seconds, they can. 30, they can. Would like one program that will do all of this. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform windows