Yes, I believe this is what you are after. If I'm not mistaken, the +12 db is for line level (your Octatrack cue outs) and +18 db is for instrument level guitar pedals. There is a switch for +12/+18 on each set of ins and outs. The Xchangr would allow you to have one stereo or dual mono set of inputs to your modular, and two stereo or dual mono outputs to send back to your Octatrack or to an external mixer, effects processor, etc.