I'm very much a newbie starting out with Logic Pro x and at the moment I'm trying to use my Roland TR09, TB03 and Korg Kontrol Keyboard with logic and get them all to play at the same time. I am connecting each instrument directly into the Mac using USB cables. I finally figured out how to get one instrument play by going to preferences>audio>input device and then selecting either the TR09 or TB03 etc as the input, and then output device as the output so that it plays from my Mac speakers rather than the instrument. However, this instrument then plays on all tracks that I have external instrument selected. Is there a way so that I can have the TB03 playing as track 1, TR09 etc etc and if so how? Any help appreciated.