Audio file (like mp3) speed changer software

I need a software which makes it possible for you to listen to mp3 (and other music)? files as fast as 8 times faster than the? original speed, and as low as 0.5 times as? the original? speed, without lowering the quality of voice (i.e. you can clearly recognize the words, though it maybe? too fast to? understand everything) Basically,? I want it? to have (almost) the same features of a standard music player, like media player or Itunes. So you can drag and drop mp3 files,? make a play list, shuffle etc AND you can change the speed without lowering the quality of the voice. (The purpose is for language learning, fast learning, or listen to the recorded voice? of the meeting in a shorter time...Probably you get the idea now) Must have is basic functions of a regular music player, able to play basic? audio files (wav, mp3, ogg...as much as possible), Key(pitch) change, easily select files (drag-drop or choose from a folder), unselect the files, delete from the list etc, able to choose the time between the tracks(files),? AND morst importantly speed change between 0.5 - 8.0 times. Basic Skin. I have the software I want the same funtions(Japanese). It has the traial version so I attached it in the last. So please download it and try it if you don't mind. After you download it you would probably know how to make it work though it's in Japanese. Want to have (not must, if possible depending on money) is? playing? directly from CD. If it is too much of a trouble I? don't want? you to bother. Other than that,? it is my first time? working on a software project so not sure about *need a trial version or not *How to secure the software (serial? # etc) Please bid on the "must have" and add comment about extras (paly from CD, security etc) Also? I want someone helpful and patient, because? I am a layman for this kind of things.? I want some advice on how to secure the software and stuff. ? ? ? ? ? ? ? ? ## Deliverables I honestly have no idea how difficult or how much cost it takes for this. So please forgive me if my budget is too low for this. I'd like someone who is very patient with me, because I am a layman when it comes to programing. (I'm a marketter). Since it is my first time, I'd also need some advice how to secure the software. Or if I should make a trial version or not. If possible please mention if I want a trial version (30days etc) then how much additional cost it would be. I attached software which I has the same functions as I want. It is in Japanese. Of course I am? NOT asking you to make exactly the same thing.? However? what I want is? something which has the same functions? as this software (and voice quality).