Hi there I have borrowed an mbox from friend to do some editing away from my studio. I do not have any monitors set up where i am and no headphone either to connect to the mbox. i was hoping i could set my output to built in output on the AMS (I am running macbook pro) but there seems to be no sound when i open pro tools up. i only have the option of output 1 and 2 on master fader to output. i take it what i want to do is not possible as you have to input / output through pro tools interface etc??? thanks for any help.