With the mixer in performance mode, can I use sliders 1-4 as faders for zones 1-4? I am able change the volume (and other parameters) of each zone independently/monophonically, but can I do it polyphonically in real time? I seem to be able to do this OK for parts 8-16 while in the step sequencer, but I can't get it to work for parts 1-4. This would be very useful for fine tuning sounds in performance mode. There is something called “solo mode” in the mixer, but it makes no difference whether it's on or off.