In theory, the second USB port on the Rane 62 could be used as a recording bus. I have not tried this yet, but the 62 is a Core Audio device and while the software is being controlled on USB A, the record output could be routed out USB B and into a third party application such as MixEmergency. Again, based on information given by Rane, this could be true, but I have not had an opportunity to test it yet. Does anyone else have info to support or dispute this theory?