Automatically Notating Prerecorded MIDI and Audio Tracks In X2 Pro?

Hi Christopher. If the parts are on midi tracks (saved as a midi file or Sonar project), simply import the file into Sonar, select a midi track and choose staff view.
 
IMHO though Sonar does not excell when it comes to notation. Sibelius is my weapon of choice for that particular task.

In addition to the native ability in Sonar to populate its Staff View from a midi track, there are also a few freeware programs out there that can do that as well, and are a bit more robust:
 
Finale makes a freeware notation from midi program: Notepad
 
Also, one called MuseScore is pretty good for free.
 
There are REALLY good commercial programs that do midi to notation with all kinds of well-done editing for any kind of scoring you need, such as Finale's flagship program, called Finale, and also the one mentioned in the earlier post.
 
I would suggest you start with looking at what is already available through Sonar's built-in staff view for existing midi tracks, and then if needing more, look to the freeware programs I list here, and if those also don't meet your needs, then you could evaluate the commercial ones, which are some of the best ones out there.
 
Bob Bone