[Darryl Ramm]

Presuming you are after a dry signal? And are OK losing use of the rig processing for other signals? (Otherwise this is not that useful a setup, either use the Eleven Rack as the interface, or upgrade your main interface, look at an ADAT preamp, etc.)..

Open up the Eleven Rack User Guide.

Use the digital output split rig in/out mode described there to get the rig input set to one side of the (spiff and AES/EBU) digital outputs. Set the rig input to mic in.