I don't have SONAR on this Chromebook and going from memory (of SONAR Home Studio 6!), I would make a copy of the stereo master mixdown, import it into a new project and use Process>Length to make the song shorter, thus faster.
Try 95% or even 90% and you will probably not hear any artifacts.
I'm pretty sure the more modern programs have a similar function, somewhere.
Have fun!