With the help of some detailed advice from mysticfig, I've now got the Cubase Control Room patched through my d8b to deliver cue mixes to my headphone amp. As I said in my e-mail back to Jeff, "My d8b is being the world's biggest Big Knob." (The latter is a tiny little piece of Mackie gear that's used to run a control room. The d8b, well, not so much.)

Anyway, things are now in good shape for when sweetmusic_27 comes by to record this weekend. We'll see how much recording I get done ahead of that -- there's a whole stack of Windycon, ISFiC, and ISFiC Press stuff that I need to move...