Are you sure about that, Sam? My understanding is that the KPA recognizes whenever it is a Merged file format, and as such, will not need to implement the Cab Driver algorithm in either of your aforementioned scenarios.
Cheers,
John
That was the behaviour when 3.x was released, at least. Easy enough to try it for yourself; just deselect Cab, then compare the tone with when you select the option in the Output section.