Thanks to Kevin (blu666z) I have a happy minidisc deck plugged in to my Zoltrix and it's playing a disc now.
I'm recording using the Audio Rack, since I couldn't find any other way to access the digital stuff, with SPDIF IN checked. I did a little test file with both line in and SPDIF in, neither had that awful noise in the file so I'm dumping a minidisc for real now. I think.
My question is, when I started recording on the Audio Rack it recorded silence before I hit the play button on the MD deck. Is this normal with this program, or is something wrong and it should have only started when it got a signal? I guess what I'm wondering if there's like an automatic on/off for recording.
I also still have Total Recorder installed and I hope that's not messing things up.