I was just messing around with this last night. I finally got an MFC-101, so I was configuring my expression pedals, which are all Roland EV-5's. Otherwise I've also always used the Ernie Ball volume pedals, so I was trying to recreate the feel of it. I'm not sure if I nailed it exactly, but here's the setting I'm pretty happy with: Set the taper in the volume block to 'linear,' and then on the controller page for the pedal, move the 'mid' setting from 50% up to 60% (or around there). All of the other settings (including the log tapers) seemed to waste too much of the heel part of the pedal, causing a bump in volume towards the front that I didn't like (which actually is like the Ernie Ball when you flip the taper switch hidden on the inside of the pedal).