Unfortunately there are many features that were lost with the switch from Fireware to USB on this mixer, I see it reported here and I also reported it. I think it is very well that customers complain and UC Surface is redone in order to correct the attributes of the latest FIREWARE mixer to the maximum. Much has been lost. It's Sad I don't want to believe that the Presonus brand is turning away from its customers. My request for example has not yet been reviewed, at least in the last version released. I will go on the 5 product of pressonus all mixeres.