I misunderstood your earlier comments then, I didn't realize you have ripped MLP and wav available.
Just so I understand correctly, your receiver, SSP, etc. does not have a USB input that's why you can't test, is that correct? You don't have a SP3? And gbaby doesn't have any high res multi-channel files, otherwise he would be able to connect via USB and confirm? Is there anyway you can get gbaby one of your files so he can test?