I'm using the Studio 192 for a theatre show. The Logic session is in 7.1. I'm using the ADAT outputs (48khz) [EDIT: into a Behringer ADA8200] and want to use the Surround out+panner, but everything seems to just be some version of stereo—i.e., all the ADAT outputs/pairs seem to just be relaying a stereo/master mix. In case that isn't clear, I seem to have 3 lefts and 3 rights—there's no differentiation between L/R, Lm/Rm, and Lsur/Rsur.

I've tried using the I/O Labels options, and choosing outputs from 17-24, but I then I get no output at all. I can get output again if I route Logic to "LineOut 1/2", for example.

Help!