I remember when sound boards first supported "articulated" locos to enable chuffing from both prime movers. Many people used them incorrectly on models of real mallets.
In your case, it is actually correct, since this is not a mallet, but an articulated compound. I do enjoy all that sound. So if one set of drivers slip, you should be able to hear the "offset" change between the front and the rear if there are independent chuff triggers on the prime movers. Many sound cards would simulate this "in and out of sync" on auto chuff.
"The tonnage rating of the two articulated (mistakenly and persisently called "mallets") was approximately double that of the heaviest locomotives they replaced. They weren't mallets because technically a mallet is a compound locomotive that uses steam twice, first in high pressure cylinders and then in lower pressure cylinders. These articulated engines used high pressure steam in all four cylinders. "
Greg