Should be able to.

Save the project in magix as a mid file, then open that mid file in RB.
Make sure the tempo is the same as it was before.
Check the chord progression that RB comes up with for your song, using the chords window.
Select a blank track,and then the area of the track you want generate (probably select whole track).
Pick a style, or a real track (or realdrum) and generate.

Have fun


I do not work here, but the benefits are still awesome
Make your sound your own!