Import Audio .aif or .wav

I am working with the Content Management template to create music catalog. Using the GetContainerAttribute to load the metadata from an mp3 or m4a works great. However it does not work with .aif or .wav files. These files have exactly the same metadata when imported into iTunes, but FMP does not recognize them. In fact if you convert an aif to an mp3 (from iTunes) then import the mp3 into FMP it works just fine, but the aif imported directly does not. The catalog is going to be a mixture of all four formats, so converting them all is not going to be a workable solution. Does any one have any experience with a workaround to try to extract the metadata? 

Thanks, David

12 Click Bait (MAIN).mp3

VH065_12_CLICK_BAIT_(MAIN)_Joseph_Saba,_ASCAP_50_Stewart_Winter,_ASCAP_50.aif