Dnewhous, this thread is a waste of time unless you clearly state what you are hoping to accomplish, Unless you clearly state what you hope to accomplish with this filter then any advice given is worthless. You give a tiny tidbit of information and then scold Jwmazur for offering advice on what he can only hope to guess is your intent.
Statements like this
After looking into this a little more closely, it appears that what I'm looking for is referred to as a "digital mastering processor." It incorporates a low pass filter with the ADC. See, for instance, the Drawmer DC2476.
The piece you refer to has multiple functions so we can only guess what problem you are trying to solve.
Either come clean with the details of what your system is and what you hope to improve or stay at home.