peter Hi Peter, no they are not physical individual ports they are combined ports via the single usb input. the full desk performs via midi as a 48x48 sound card with 4 midi in and out on it as well on one USB port . Its class compliant so the iPad should recognise all of it (as it did with my M32 desk which was 32x32 audio and only 1 midi port on the usb). im just not sure how to address accessing the individual 1,2,3 and 4th midi ports via stage Traxx. Will hook the iPad up to the desk later and see what I can see.