We are using qlab with great success at our theater, and recently bought a TC electronics Impakt Twin. The problem I ran in to is that I can´t get qlab to recognize the separate outputs of the Impakt, only the Impakt as a stereo output. Anyone using some other interface that has ran in to the similar problem? Our setup is a 2.66 ghz quadcore running Snowleopard. What I´m mostly interested in is being able to use the adat outputs of the TC