midi implimentation

does anyone know if there is a way to use the mixer via midi.like hook up a knob box and control the volumn on different channels. what can be controlled via midi.i checked the manual on the midi implimentation...and well the documentation sucks

i had no problem with the manual, i think it's pretty understandable.
whatever: i don't think you can use the internal mixer with midi. but i'm not 100% sure.
but you can select several pads at a time by going to the mixer screen, holding shift and pressing them, then use the sliders to control the volume and pan. but this only working at the mixer screen kinda sucks...
would be great if you could use the sliders to simultaniously mix some pads without opening that screen and select them.