Hi,
There is a .pdf document on the RFX card at E-mu's website. If you follow the link to products, then samplers, it will be up at the top. Then at the bottom of the RFX-32 specs page, you'll see a link to the .pdf. Download it and check it out. I haven't looked at it in depth yet so I don't know if it mentions being able to route inputs through the filters in real-time or not.
HTH,
Fernando