Schiit Eitr with Aurender N100H

I’ve been using the new Schiit Eitr USB-to-S/PDIF converter with my Aurender N100H and I’m having an odd problem. When I stream Tidal, the Eitr works perfectly. When I play files from the hard drive, there is no sound. I have 2 other USB-to-SPDIF converters (Singxer F-1 and Mutec MC-3+ USB) and they play files and Tidal perfectly. Is anyone else using an Eitr with an N100H?

Dave