For some strange reason Logic, and any audio I try to play whether it's from iTunes, or Logic, would quit on me if the Apogee Ensemble it the audio playback. Logic wont even open since the last setting for Audio & Hardware was the Apogee Ensemble. The only way Logic would open if I turn off the Apogee, and it goes to the built in audio. Even when I go to my preferences, and manually change it to built in audio the Apogee would light red on channels 3 & 4. So I'm not sure what's going on.