I am trying to decide on an electric drum kit to get. I was hoping to find one with an optical output to send to the H9000 but I can’t seem to find one. Nearly all of them have USB output though. Would it be possible to use that with the H9000? Would I have to use the type B port on the back of the H9000 or could I use one of the type A ports? I’d like to avoid the type B port because that’s how my H9000 communicates with my computer. Ideally I could have that connected for recording while having the drums sending signal to the H9000.