I don't think exploring the concept is a complete waste of time, provided your goals are realistic.  Every now and then you can luck out and pull a prominent instrument out of a mix enough to get starting point for that instrument.  If you can be successful grabbing one instrument, it lightens the guesswork on some of the other instruments for those of us without perfect pitch and chord recognition.

Dear Atsuku and Dubdiscipe,
Honestly, I should say that, I am not enough educated in Music Software and voice engineering right now to can afford to find a way for the conversion. I am not going to kill My dream,Just I am going to freeze it till when became more powerful in the fields. I am not the person Who get easily disappointed. I have to earn more experience and then absolutely ,I can have better perspective on the matter.
 
Regards
Ramtin

worstcaseontario

I accidentally dropped an audio clip into a MIDI track in Sonar X3 Pro

And it turned into a MIDI clip. And the MIDI clip played a line VERY close to the audio. If I'd known Sonar X3 could do that, I would have got it years ago. 
 

 
I was searching the forum for some other purpose and accidently I found the post. I recommend that visit the link below.It would be intersting for you!
http://forum.cakewalk.com/FindPost/2908365
 
Regard
Ramtin

An audio clip is a very simple kind of audio meant to be used in a loop. It may be a drum loop or a simple piano clip. It will not be a full mixed song with all the instruments mashed together. Converting that sort of simple clip is doable and has been for a while now. But it isn't a song. 

Ramtin - it will take some time and lots of exploring, to develop a good level of knowledge of the capabilities and limitations of Sonar, and of audio processing in general on a computer.
 
It is a good thing that you are looking into all of this, however I would suggest you take a look at starting with getting a good awareness of the functional capabilities that are already present, because this will advance your ability to USE all of the functionality already built into the product.
 
There are lots of free videos, as well as ones for purchase, and there are also some TRULY well-written books on getting the most out of a given version of Sonar, as well as some basic tutorials, all to get you up to speed.
 
So, grab some coffee, arm some tracks, and dive in.  ALL of us have had to, and are still going through, a learning curve with Sonar.  The trick is to learn how to learn - learn how to find help in the documentation, where to go to find books and videos, take a few hours or a whole day, and read through the Sonar documentation.  Make notes, or create hundreds of little 'snippet' notes in Notepad, so you can look things up later, as needed.
 
I hope you have a lot of fun getting to know Sonar, and that you learn to express yourself musically with it.  It's a great product, and a great forum from which you can draw help when you need it.
 
Bob Bone