Trying to find out what a solar system sounds like, eh...
I don't think there's currently any way to have the program export data on its own but, although time-consuming, you could copy down the orbital elements and have that "on rails" so to speak to create the audio and if necessary, use another program to do the mathematics involved, I don't know much about this sort of thing so I don't know the details, and so pardon me if I'm completeely wrong ...and the idea isn't very satisfying, I know, but its the only way I can think of that you could do this since you can't export data.