I'm currently using a MicroKorg live for some synth bass lines. I run my bass and keyboard into an AB box before other effects and my amp. Does everyone who does this just use an AB box? I was thinking about using some sort of blending/mixing solution so that I don't have to hit the switch on the AB box to change instruments. This would help on songs where I go quickly from bass on one part to key-bass on another. I was considering something like this: http://www.morleypedals.com/dabymix.html But I'm not sure what other options there are.