
To answer your question jb, SPDIF doesn't "show up" in Sonar at all (directly), but if you wire SPDIF Source to Wave Destination(?) then SPDIF is sent through the Wave drivers, and you can record it that way.
With Logic/Cubase, you use "ASIO Destination" instead of Wave Destination, and in Sonar, I'm not exactly sure what drivers that uses, but I'm assuming it's Wave Destination. (Can you confirm?)
Might want to check that you're getting a SPDIF signal by connecting a VU meter before the destination and be sure you're using fresh clean SPDIF modules from V3.01.