I have been looking at some small mixers like an 8-10 channel for some synths,workstations,etc.. Well I got a m-audio fast track mk interface, (single channel for mic) & I was wondering if I get a usb mixer & say for example If I add a roland fantom, mpc, & other workstations in the 8-10 channels when I open protools will these channels show up in protools (since its a usb mixer), if not is there a way without having to get another interface?? I'm going to be running a midi controller (m-audio) & mpd also so theres no need for an mpc I was just using that as an example but I would like to get some hardware to in the lab..