OK, here's the deal. I recently got my midi setup, and so now have two signals to blend i.e. raw bass and midi. I'd like to be able to switch between both live, preferably via footswitch, and ideally have a mix output as well i.e. A/B/AB. As both may have differing levels, I'd like to have gain control on both channels to get level parity. I'd then need an XLR out for FOH DI. Closest I can find to this is the Radial BassBone, which from what I can see does everything apart from the AB blending. I can think of ways to fudge the blending, but it would be a kludge and not an ideal solution. Any comments / suggestions / other ideas?