[LAU] ir.lv2 controls

Has anyone figured out the effect of "Stereo in/IR" control on the ir.lv2 plugin? From the naming I would have expected similar to the "Dry" and "Wet" level controls, but the two sliders (labeled from 0% to 150%) do not have the same effect. I can set the Stereo In and IR slider both to 0% and still hear the IR effect on the bus, when I set either to 150% I do not hear an obvious change. I am not using the envelope controls currently, do they perhaps interact with those controls in some way? I noticed that when I hit the "Reset" button the envelope and length controls both went back to 100%, the stereo in and IR controls both went back to 100%, but even with the envelope active I could not tell what effect the stereo in and IR controls had. Any hints? -- Chris Caudle