I'm not sure what you mean, I've been using it to drive MODO bass all day? I'm using Studio One, which I find has some of the best midi routing for plugins. I do have to turn down the volume on EZbass, but I love that it also works from the browser. I can record a new part to my DAW just by switching and combining different clips.
Otherwise excellent piece of software. Also, where is this 1.3.0 version listed in the manual? EZKeys is about the only thing not importing and causing it to crash S1?