You are correct Keith. I did a quick scan of the manual in the USB section and it is both an input and an output. Since it was located on the back to the left with the outputs I mistakenly assumed it was output only.

I did a youtube search of "Tascam Model 12 tutorial" and there were several videos that looked as if they might be useful.

Be sure to give us an update after you've had a chance to try it out.