Folks - there is a reason an audio precision costs 10's of thousands. Don't for one minute think you are going to get results as good as it using a couple of hundred £ ADC (No matter how good that ADC may be), combined with consumer grade PC, power systems and interconnects.
Well, you probably can come close. At least, close enough for hobbyist purposes. The problem is that it takes real effort to get it all right. Optimization of those PCs, power systems, and interconnects takes time and often money. Most owners of AP test systems value the time it takes to get it right more than hobbyists do. And, they should. Many hobbyists demand plug and play perfection.
I think the big point this all highlights is that in a real system, you can't just plug in any piece of gear and expect to get system performance that matches the idealized test results. The good news is that this may not matter so much in a practical sense.