Well now, you're getting more complicated if you want to connect 2 PCs and the ReD32. If I was doing this and wanted to connect all this, and possibly more, I'd get a MIDI hub. Take a look: https://www.bhphotovideo.com/c/product/1447522-REG/esi_esi_m8uex_m8u_ex_16_port_usb.html This one has 8 ports and costs almost $300. But you can get them for under $100 depending on how many ports you want. These are most often used by keyboardists who may have several keyboards (synths, piano, organ, etc., and several sound modules. Some keyboardists will actually have all this at every gig which can be a real setup chore. Just do a search for "MIDI hubs" to learn more and see many options. HOWEVER, my suggestion to you would be to first try getting your ReD32 working with one PC to your ReD32 through the DM as we've been discussing. Once you've had some problems, resolved them, and learned more about using MIDI, it'll make more sense to tackle a bigger setup. Otherwise, you chance getting frustrated and going nowhere because you're trying to learn on a complex setup and you still want to first get a good handle on the basics. In fact, I suggest you do some research and reading on the following topics before starting: 1. MIDI 2. MIDI Clock 3. MTC 4. MMC You're going to need to set Master/Slaves, MIDI channels, assure you've got inputs and outputs correctly connected and configured, and more. Getting that under your belt first should make it a lot easier to resolve problems and get an understanding as you keep adding devices. And believe me, there will initially be problems as you try to do this for the first (or second) time. Conversely, don't let that dissuade you from doing this - it doesn't take an engineering degree to do this stuff and many musicians use MIDI easily without any technical background. Like everything else, you need to learn some basics and charge ahead learning and solving problems as you go. Starting simple to learn the basics and achieve some success will also provide some confidence that you're on the right track and understanding the fundamentals. We all go through this at the beginning. And similarly, all skiers sometimes fall, even Olympians.